1// -*- C++ -*- 2//===--------------------------- random -----------------------------------===// 3// 4// The LLVM Compiler Infrastructure 5// 6// This file is dual licensed under the MIT and the University of Illinois Open 7// Source Licenses. See LICENSE.TXT for details. 8// 9//===----------------------------------------------------------------------===// 10 11#ifndef _LIBCPP_RANDOM 12#define _LIBCPP_RANDOM 13 14/* 15 random synopsis 16 17#include <initializer_list> 18 19namespace std 20{ 21 22// Engines 23 24template <class UIntType, UIntType a, UIntType c, UIntType m> 25class linear_congruential_engine 26{ 27public: 28 // types 29 typedef UIntType result_type; 30 31 // engine characteristics 32 static constexpr result_type multiplier = a; 33 static constexpr result_type increment = c; 34 static constexpr result_type modulus = m; 35 static constexpr result_type min() { return c == 0u ? 1u: 0u;} 36 static constexpr result_type max() { return m - 1u;} 37 static constexpr result_type default_seed = 1u; 38 39 // constructors and seeding functions 40 explicit linear_congruential_engine(result_type s = default_seed); 41 template<class Sseq> explicit linear_congruential_engine(Sseq& q); 42 void seed(result_type s = default_seed); 43 template<class Sseq> void seed(Sseq& q); 44 45 // generating functions 46 result_type operator()(); 47 void discard(unsigned long long z); 48}; 49 50template <class UIntType, UIntType a, UIntType c, UIntType m> 51bool 52operator==(const linear_congruential_engine<UIntType, a, c, m>& x, 53 const linear_congruential_engine<UIntType, a, c, m>& y); 54 55template <class UIntType, UIntType a, UIntType c, UIntType m> 56bool 57operator!=(const linear_congruential_engine<UIntType, a, c, m>& x, 58 const linear_congruential_engine<UIntType, a, c, m>& y); 59 60template <class charT, class traits, 61 class UIntType, UIntType a, UIntType c, UIntType m> 62basic_ostream<charT, traits>& 63operator<<(basic_ostream<charT, traits>& os, 64 const linear_congruential_engine<UIntType, a, c, m>& x); 65 66template <class charT, class traits, 67 class UIntType, UIntType a, UIntType c, UIntType m> 68basic_istream<charT, traits>& 69operator>>(basic_istream<charT, traits>& is, 70 linear_congruential_engine<UIntType, a, c, m>& x); 71 72template <class UIntType, size_t w, size_t n, size_t m, size_t r, 73 UIntType a, size_t u, UIntType d, size_t s, 74 UIntType b, size_t t, UIntType c, size_t l, UIntType f> 75class mersenne_twister_engine 76{ 77public: 78 // types 79 typedef UIntType result_type; 80 81 // engine characteristics 82 static constexpr size_t word_size = w; 83 static constexpr size_t state_size = n; 84 static constexpr size_t shift_size = m; 85 static constexpr size_t mask_bits = r; 86 static constexpr result_type xor_mask = a; 87 static constexpr size_t tempering_u = u; 88 static constexpr result_type tempering_d = d; 89 static constexpr size_t tempering_s = s; 90 static constexpr result_type tempering_b = b; 91 static constexpr size_t tempering_t = t; 92 static constexpr result_type tempering_c = c; 93 static constexpr size_t tempering_l = l; 94 static constexpr result_type initialization_multiplier = f; 95 static constexpr result_type min () { return 0; } 96 static constexpr result_type max() { return 2^w - 1; } 97 static constexpr result_type default_seed = 5489u; 98 99 // constructors and seeding functions 100 explicit mersenne_twister_engine(result_type value = default_seed); 101 template<class Sseq> explicit mersenne_twister_engine(Sseq& q); 102 void seed(result_type value = default_seed); 103 template<class Sseq> void seed(Sseq& q); 104 105 // generating functions 106 result_type operator()(); 107 void discard(unsigned long long z); 108}; 109 110template <class UIntType, size_t w, size_t n, size_t m, size_t r, 111 UIntType a, size_t u, UIntType d, size_t s, 112 UIntType b, size_t t, UIntType c, size_t l, UIntType f> 113bool 114operator==( 115 const mersenne_twister_engine<UIntType, w, n, m, r, a, u, d, s, b, t, c, l, f>& x, 116 const mersenne_twister_engine<UIntType, w, n, m, r, a, u, d, s, b, t, c, l, f>& y); 117 118template <class UIntType, size_t w, size_t n, size_t m, size_t r, 119 UIntType a, size_t u, UIntType d, size_t s, 120 UIntType b, size_t t, UIntType c, size_t l, UIntType f> 121bool 122operator!=( 123 const mersenne_twister_engine<UIntType, w, n, m, r, a, u, d, s, b, t, c, l, f>& x, 124 const mersenne_twister_engine<UIntType, w, n, m, r, a, u, d, s, b, t, c, l, f>& y); 125 126template <class charT, class traits, 127 class UIntType, size_t w, size_t n, size_t m, size_t r, 128 UIntType a, size_t u, UIntType d, size_t s, 129 UIntType b, size_t t, UIntType c, size_t l, UIntType f> 130basic_ostream<charT, traits>& 131operator<<(basic_ostream<charT, traits>& os, 132 const mersenne_twister_engine<UIntType, w, n, m, r, a, u, d, s, b, t, c, l, f>& x); 133 134template <class charT, class traits, 135 class UIntType, size_t w, size_t n, size_t m, size_t r, 136 UIntType a, size_t u, UIntType d, size_t s, 137 UIntType b, size_t t, UIntType c, size_t l, UIntType f> 138basic_istream<charT, traits>& 139operator>>(basic_istream<charT, traits>& is, 140 mersenne_twister_engine<UIntType, w, n, m, r, a, u, d, s, b, t, c, l, f>& x); 141 142template<class UIntType, size_t w, size_t s, size_t r> 143class subtract_with_carry_engine 144{ 145public: 146 // types 147 typedef UIntType result_type; 148 149 // engine characteristics 150 static constexpr size_t word_size = w; 151 static constexpr size_t short_lag = s; 152 static constexpr size_t long_lag = r; 153 static constexpr result_type min() { return 0; } 154 static constexpr result_type max() { return m-1; } 155 static constexpr result_type default_seed = 19780503u; 156 157 // constructors and seeding functions 158 explicit subtract_with_carry_engine(result_type value = default_seed); 159 template<class Sseq> explicit subtract_with_carry_engine(Sseq& q); 160 void seed(result_type value = default_seed); 161 template<class Sseq> void seed(Sseq& q); 162 163 // generating functions 164 result_type operator()(); 165 void discard(unsigned long long z); 166}; 167 168template<class UIntType, size_t w, size_t s, size_t r> 169bool 170operator==( 171 const subtract_with_carry_engine<UIntType, w, s, r>& x, 172 const subtract_with_carry_engine<UIntType, w, s, r>& y); 173 174template<class UIntType, size_t w, size_t s, size_t r> 175bool 176operator!=( 177 const subtract_with_carry_engine<UIntType, w, s, r>& x, 178 const subtract_with_carry_engine<UIntType, w, s, r>& y); 179 180template <class charT, class traits, 181 class UIntType, size_t w, size_t s, size_t r> 182basic_ostream<charT, traits>& 183operator<<(basic_ostream<charT, traits>& os, 184 const subtract_with_carry_engine<UIntType, w, s, r>& x); 185 186template <class charT, class traits, 187 class UIntType, size_t w, size_t s, size_t r> 188basic_istream<charT, traits>& 189operator>>(basic_istream<charT, traits>& is, 190 subtract_with_carry_engine<UIntType, w, s, r>& x); 191 192template<class Engine, size_t p, size_t r> 193class discard_block_engine 194{ 195public: 196 // types 197 typedef typename Engine::result_type result_type; 198 199 // engine characteristics 200 static constexpr size_t block_size = p; 201 static constexpr size_t used_block = r; 202 static constexpr result_type min() { return Engine::min(); } 203 static constexpr result_type max() { return Engine::max(); } 204 205 // constructors and seeding functions 206 discard_block_engine(); 207 explicit discard_block_engine(const Engine& e); 208 explicit discard_block_engine(Engine&& e); 209 explicit discard_block_engine(result_type s); 210 template<class Sseq> explicit discard_block_engine(Sseq& q); 211 void seed(); 212 void seed(result_type s); 213 template<class Sseq> void seed(Sseq& q); 214 215 // generating functions 216 result_type operator()(); 217 void discard(unsigned long long z); 218 219 // property functions 220 const Engine& base() const noexcept; 221}; 222 223template<class Engine, size_t p, size_t r> 224bool 225operator==( 226 const discard_block_engine<Engine, p, r>& x, 227 const discard_block_engine<Engine, p, r>& y); 228 229template<class Engine, size_t p, size_t r> 230bool 231operator!=( 232 const discard_block_engine<Engine, p, r>& x, 233 const discard_block_engine<Engine, p, r>& y); 234 235template <class charT, class traits, 236 class Engine, size_t p, size_t r> 237basic_ostream<charT, traits>& 238operator<<(basic_ostream<charT, traits>& os, 239 const discard_block_engine<Engine, p, r>& x); 240 241template <class charT, class traits, 242 class Engine, size_t p, size_t r> 243basic_istream<charT, traits>& 244operator>>(basic_istream<charT, traits>& is, 245 discard_block_engine<Engine, p, r>& x); 246 247template<class Engine, size_t w, class UIntType> 248class independent_bits_engine 249{ 250public: 251 // types 252 typedef UIntType result_type; 253 254 // engine characteristics 255 static constexpr result_type min() { return 0; } 256 static constexpr result_type max() { return 2^w - 1; } 257 258 // constructors and seeding functions 259 independent_bits_engine(); 260 explicit independent_bits_engine(const Engine& e); 261 explicit independent_bits_engine(Engine&& e); 262 explicit independent_bits_engine(result_type s); 263 template<class Sseq> explicit independent_bits_engine(Sseq& q); 264 void seed(); 265 void seed(result_type s); 266 template<class Sseq> void seed(Sseq& q); 267 268 // generating functions 269 result_type operator()(); void discard(unsigned long long z); 270 271 // property functions 272 const Engine& base() const noexcept; 273}; 274 275template<class Engine, size_t w, class UIntType> 276bool 277operator==( 278 const independent_bits_engine<Engine, w, UIntType>& x, 279 const independent_bits_engine<Engine, w, UIntType>& y); 280 281template<class Engine, size_t w, class UIntType> 282bool 283operator!=( 284 const independent_bits_engine<Engine, w, UIntType>& x, 285 const independent_bits_engine<Engine, w, UIntType>& y); 286 287template <class charT, class traits, 288 class Engine, size_t w, class UIntType> 289basic_ostream<charT, traits>& 290operator<<(basic_ostream<charT, traits>& os, 291 const independent_bits_engine<Engine, w, UIntType>& x); 292 293template <class charT, class traits, 294 class Engine, size_t w, class UIntType> 295basic_istream<charT, traits>& 296operator>>(basic_istream<charT, traits>& is, 297 independent_bits_engine<Engine, w, UIntType>& x); 298 299template<class Engine, size_t k> 300class shuffle_order_engine 301{ 302public: 303 // types 304 typedef typename Engine::result_type result_type; 305 306 // engine characteristics 307 static constexpr size_t table_size = k; 308 static constexpr result_type min() { return Engine::min; } 309 static constexpr result_type max() { return Engine::max; } 310 311 // constructors and seeding functions 312 shuffle_order_engine(); 313 explicit shuffle_order_engine(const Engine& e); 314 explicit shuffle_order_engine(Engine&& e); 315 explicit shuffle_order_engine(result_type s); 316 template<class Sseq> explicit shuffle_order_engine(Sseq& q); 317 void seed(); 318 void seed(result_type s); 319 template<class Sseq> void seed(Sseq& q); 320 321 // generating functions 322 result_type operator()(); 323 void discard(unsigned long long z); 324 325 // property functions 326 const Engine& base() const noexcept; 327}; 328 329template<class Engine, size_t k> 330bool 331operator==( 332 const shuffle_order_engine<Engine, k>& x, 333 const shuffle_order_engine<Engine, k>& y); 334 335template<class Engine, size_t k> 336bool 337operator!=( 338 const shuffle_order_engine<Engine, k>& x, 339 const shuffle_order_engine<Engine, k>& y); 340 341template <class charT, class traits, 342 class Engine, size_t k> 343basic_ostream<charT, traits>& 344operator<<(basic_ostream<charT, traits>& os, 345 const shuffle_order_engine<Engine, k>& x); 346 347template <class charT, class traits, 348 class Engine, size_t k> 349basic_istream<charT, traits>& 350operator>>(basic_istream<charT, traits>& is, 351 shuffle_order_engine<Engine, k>& x); 352 353typedef linear_congruential_engine<uint_fast32_t, 16807, 0, 2147483647> 354 minstd_rand0; 355typedef linear_congruential_engine<uint_fast32_t, 48271, 0, 2147483647> 356 minstd_rand; 357typedef mersenne_twister_engine<uint_fast32_t, 32, 624, 397, 31, 358 0x9908b0df, 359 11, 0xffffffff, 360 7, 0x9d2c5680, 361 15, 0xefc60000, 362 18, 1812433253> mt19937; 363typedef mersenne_twister_engine<uint_fast64_t, 64, 312, 156, 31, 364 0xb5026f5aa96619e9, 365 29, 0x5555555555555555, 366 17, 0x71d67fffeda60000, 367 37, 0xfff7eee000000000, 368 43, 6364136223846793005> mt19937_64; 369typedef subtract_with_carry_engine<uint_fast32_t, 24, 10, 24> ranlux24_base; 370typedef subtract_with_carry_engine<uint_fast64_t, 48, 5, 12> ranlux48_base; 371typedef discard_block_engine<ranlux24_base, 223, 23> ranlux24; 372typedef discard_block_engine<ranlux48_base, 389, 11> ranlux48; 373typedef shuffle_order_engine<minstd_rand0, 256> knuth_b; 374typedef minstd_rand default_random_engine; 375 376// Generators 377 378class random_device 379{ 380public: 381 // types 382 typedef unsigned int result_type; 383 384 // generator characteristics 385 static constexpr result_type min() { return numeric_limits<result_type>::min(); } 386 static constexpr result_type max() { return numeric_limits<result_type>::max(); } 387 388 // constructors 389 explicit random_device(const string& token = "/dev/urandom"); 390 391 // generating functions 392 result_type operator()(); 393 394 // property functions 395 double entropy() const noexcept; 396 397 // no copy functions 398 random_device(const random_device& ) = delete; 399 void operator=(const random_device& ) = delete; 400}; 401 402// Utilities 403 404class seed_seq 405{ 406public: 407 // types 408 typedef uint_least32_t result_type; 409 410 // constructors 411 seed_seq(); 412 template<class T> 413 seed_seq(initializer_list<T> il); 414 template<class InputIterator> 415 seed_seq(InputIterator begin, InputIterator end); 416 417 // generating functions 418 template<class RandomAccessIterator> 419 void generate(RandomAccessIterator begin, RandomAccessIterator end); 420 421 // property functions 422 size_t size() const; 423 template<class OutputIterator> 424 void param(OutputIterator dest) const; 425 426 // no copy functions 427 seed_seq(const seed_seq&) = delete; 428 void operator=(const seed_seq& ) = delete; 429}; 430 431template<class RealType, size_t bits, class URNG> 432 RealType generate_canonical(URNG& g); 433 434// Distributions 435 436template<class IntType = int> 437class uniform_int_distribution 438{ 439public: 440 // types 441 typedef IntType result_type; 442 443 class param_type 444 { 445 public: 446 typedef uniform_int_distribution distribution_type; 447 448 explicit param_type(IntType a = 0, 449 IntType b = numeric_limits<IntType>::max()); 450 451 result_type a() const; 452 result_type b() const; 453 454 friend bool operator==(const param_type& x, const param_type& y); 455 friend bool operator!=(const param_type& x, const param_type& y); 456 }; 457 458 // constructors and reset functions 459 explicit uniform_int_distribution(IntType a = 0, 460 IntType b = numeric_limits<IntType>::max()); 461 explicit uniform_int_distribution(const param_type& parm); 462 void reset(); 463 464 // generating functions 465 template<class URNG> result_type operator()(URNG& g); 466 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 467 468 // property functions 469 result_type a() const; 470 result_type b() const; 471 472 param_type param() const; 473 void param(const param_type& parm); 474 475 result_type min() const; 476 result_type max() const; 477 478 friend bool operator==(const uniform_int_distribution& x, 479 const uniform_int_distribution& y); 480 friend bool operator!=(const uniform_int_distribution& x, 481 const uniform_int_distribution& y); 482 483 template <class charT, class traits> 484 friend 485 basic_ostream<charT, traits>& 486 operator<<(basic_ostream<charT, traits>& os, 487 const uniform_int_distribution& x); 488 489 template <class charT, class traits> 490 friend 491 basic_istream<charT, traits>& 492 operator>>(basic_istream<charT, traits>& is, 493 uniform_int_distribution& x); 494}; 495 496template<class RealType = double> 497class uniform_real_distribution 498{ 499public: 500 // types 501 typedef RealType result_type; 502 503 class param_type 504 { 505 public: 506 typedef uniform_real_distribution distribution_type; 507 508 explicit param_type(RealType a = 0, 509 RealType b = 1); 510 511 result_type a() const; 512 result_type b() const; 513 514 friend bool operator==(const param_type& x, const param_type& y); 515 friend bool operator!=(const param_type& x, const param_type& y); 516 }; 517 518 // constructors and reset functions 519 explicit uniform_real_distribution(RealType a = 0.0, RealType b = 1.0); 520 explicit uniform_real_distribution(const param_type& parm); 521 void reset(); 522 523 // generating functions 524 template<class URNG> result_type operator()(URNG& g); 525 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 526 527 // property functions 528 result_type a() const; 529 result_type b() const; 530 531 param_type param() const; 532 void param(const param_type& parm); 533 534 result_type min() const; 535 result_type max() const; 536 537 friend bool operator==(const uniform_real_distribution& x, 538 const uniform_real_distribution& y); 539 friend bool operator!=(const uniform_real_distribution& x, 540 const uniform_real_distribution& y); 541 542 template <class charT, class traits> 543 friend 544 basic_ostream<charT, traits>& 545 operator<<(basic_ostream<charT, traits>& os, 546 const uniform_real_distribution& x); 547 548 template <class charT, class traits> 549 friend 550 basic_istream<charT, traits>& 551 operator>>(basic_istream<charT, traits>& is, 552 uniform_real_distribution& x); 553}; 554 555class bernoulli_distribution 556{ 557public: 558 // types 559 typedef bool result_type; 560 561 class param_type 562 { 563 public: 564 typedef bernoulli_distribution distribution_type; 565 566 explicit param_type(double p = 0.5); 567 568 double p() const; 569 570 friend bool operator==(const param_type& x, const param_type& y); 571 friend bool operator!=(const param_type& x, const param_type& y); 572 }; 573 574 // constructors and reset functions 575 explicit bernoulli_distribution(double p = 0.5); 576 explicit bernoulli_distribution(const param_type& parm); 577 void reset(); 578 579 // generating functions 580 template<class URNG> result_type operator()(URNG& g); 581 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 582 583 // property functions 584 double p() const; 585 586 param_type param() const; 587 void param(const param_type& parm); 588 589 result_type min() const; 590 result_type max() const; 591 592 friend bool operator==(const bernoulli_distribution& x, 593 const bernoulli_distribution& y); 594 friend bool operator!=(const bernoulli_distribution& x, 595 const bernoulli_distribution& y); 596 597 template <class charT, class traits> 598 friend 599 basic_ostream<charT, traits>& 600 operator<<(basic_ostream<charT, traits>& os, 601 const bernoulli_distribution& x); 602 603 template <class charT, class traits> 604 friend 605 basic_istream<charT, traits>& 606 operator>>(basic_istream<charT, traits>& is, 607 bernoulli_distribution& x); 608}; 609 610template<class IntType = int> 611class binomial_distribution 612{ 613public: 614 // types 615 typedef IntType result_type; 616 617 class param_type 618 { 619 public: 620 typedef binomial_distribution distribution_type; 621 622 explicit param_type(IntType t = 1, double p = 0.5); 623 624 IntType t() const; 625 double p() const; 626 627 friend bool operator==(const param_type& x, const param_type& y); 628 friend bool operator!=(const param_type& x, const param_type& y); 629 }; 630 631 // constructors and reset functions 632 explicit binomial_distribution(IntType t = 1, double p = 0.5); 633 explicit binomial_distribution(const param_type& parm); 634 void reset(); 635 636 // generating functions 637 template<class URNG> result_type operator()(URNG& g); 638 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 639 640 // property functions 641 IntType t() const; 642 double p() const; 643 644 param_type param() const; 645 void param(const param_type& parm); 646 647 result_type min() const; 648 result_type max() const; 649 650 friend bool operator==(const binomial_distribution& x, 651 const binomial_distribution& y); 652 friend bool operator!=(const binomial_distribution& x, 653 const binomial_distribution& y); 654 655 template <class charT, class traits> 656 friend 657 basic_ostream<charT, traits>& 658 operator<<(basic_ostream<charT, traits>& os, 659 const binomial_distribution& x); 660 661 template <class charT, class traits> 662 friend 663 basic_istream<charT, traits>& 664 operator>>(basic_istream<charT, traits>& is, 665 binomial_distribution& x); 666}; 667 668template<class IntType = int> 669class geometric_distribution 670{ 671public: 672 // types 673 typedef IntType result_type; 674 675 class param_type 676 { 677 public: 678 typedef geometric_distribution distribution_type; 679 680 explicit param_type(double p = 0.5); 681 682 double p() const; 683 684 friend bool operator==(const param_type& x, const param_type& y); 685 friend bool operator!=(const param_type& x, const param_type& y); 686 }; 687 688 // constructors and reset functions 689 explicit geometric_distribution(double p = 0.5); 690 explicit geometric_distribution(const param_type& parm); 691 void reset(); 692 693 // generating functions 694 template<class URNG> result_type operator()(URNG& g); 695 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 696 697 // property functions 698 double p() const; 699 700 param_type param() const; 701 void param(const param_type& parm); 702 703 result_type min() const; 704 result_type max() const; 705 706 friend bool operator==(const geometric_distribution& x, 707 const geometric_distribution& y); 708 friend bool operator!=(const geometric_distribution& x, 709 const geometric_distribution& y); 710 711 template <class charT, class traits> 712 friend 713 basic_ostream<charT, traits>& 714 operator<<(basic_ostream<charT, traits>& os, 715 const geometric_distribution& x); 716 717 template <class charT, class traits> 718 friend 719 basic_istream<charT, traits>& 720 operator>>(basic_istream<charT, traits>& is, 721 geometric_distribution& x); 722}; 723 724template<class IntType = int> 725class negative_binomial_distribution 726{ 727public: 728 // types 729 typedef IntType result_type; 730 731 class param_type 732 { 733 public: 734 typedef negative_binomial_distribution distribution_type; 735 736 explicit param_type(result_type k = 1, double p = 0.5); 737 738 result_type k() const; 739 double p() const; 740 741 friend bool operator==(const param_type& x, const param_type& y); 742 friend bool operator!=(const param_type& x, const param_type& y); 743 }; 744 745 // constructor and reset functions 746 explicit negative_binomial_distribution(result_type k = 1, double p = 0.5); 747 explicit negative_binomial_distribution(const param_type& parm); 748 void reset(); 749 750 // generating functions 751 template<class URNG> result_type operator()(URNG& g); 752 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 753 754 // property functions 755 result_type k() const; 756 double p() const; 757 758 param_type param() const; 759 void param(const param_type& parm); 760 761 result_type min() const; 762 result_type max() const; 763 764 friend bool operator==(const negative_binomial_distribution& x, 765 const negative_binomial_distribution& y); 766 friend bool operator!=(const negative_binomial_distribution& x, 767 const negative_binomial_distribution& y); 768 769 template <class charT, class traits> 770 friend 771 basic_ostream<charT, traits>& 772 operator<<(basic_ostream<charT, traits>& os, 773 const negative_binomial_distribution& x); 774 775 template <class charT, class traits> 776 friend 777 basic_istream<charT, traits>& 778 operator>>(basic_istream<charT, traits>& is, 779 negative_binomial_distribution& x); 780}; 781 782template<class IntType = int> 783class poisson_distribution 784{ 785public: 786 // types 787 typedef IntType result_type; 788 789 class param_type 790 { 791 public: 792 typedef poisson_distribution distribution_type; 793 794 explicit param_type(double mean = 1.0); 795 796 double mean() const; 797 798 friend bool operator==(const param_type& x, const param_type& y); 799 friend bool operator!=(const param_type& x, const param_type& y); 800 }; 801 802 // constructors and reset functions 803 explicit poisson_distribution(double mean = 1.0); 804 explicit poisson_distribution(const param_type& parm); 805 void reset(); 806 807 // generating functions 808 template<class URNG> result_type operator()(URNG& g); 809 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 810 811 // property functions 812 double mean() const; 813 814 param_type param() const; 815 void param(const param_type& parm); 816 817 result_type min() const; 818 result_type max() const; 819 820 friend bool operator==(const poisson_distribution& x, 821 const poisson_distribution& y); 822 friend bool operator!=(const poisson_distribution& x, 823 const poisson_distribution& y); 824 825 template <class charT, class traits> 826 friend 827 basic_ostream<charT, traits>& 828 operator<<(basic_ostream<charT, traits>& os, 829 const poisson_distribution& x); 830 831 template <class charT, class traits> 832 friend 833 basic_istream<charT, traits>& 834 operator>>(basic_istream<charT, traits>& is, 835 poisson_distribution& x); 836}; 837 838template<class RealType = double> 839class exponential_distribution 840{ 841public: 842 // types 843 typedef RealType result_type; 844 845 class param_type 846 { 847 public: 848 typedef exponential_distribution distribution_type; 849 850 explicit param_type(result_type lambda = 1.0); 851 852 result_type lambda() const; 853 854 friend bool operator==(const param_type& x, const param_type& y); 855 friend bool operator!=(const param_type& x, const param_type& y); 856 }; 857 858 // constructors and reset functions 859 explicit exponential_distribution(result_type lambda = 1.0); 860 explicit exponential_distribution(const param_type& parm); 861 void reset(); 862 863 // generating functions 864 template<class URNG> result_type operator()(URNG& g); 865 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 866 867 // property functions 868 result_type lambda() const; 869 870 param_type param() const; 871 void param(const param_type& parm); 872 873 result_type min() const; 874 result_type max() const; 875 876 friend bool operator==(const exponential_distribution& x, 877 const exponential_distribution& y); 878 friend bool operator!=(const exponential_distribution& x, 879 const exponential_distribution& y); 880 881 template <class charT, class traits> 882 friend 883 basic_ostream<charT, traits>& 884 operator<<(basic_ostream<charT, traits>& os, 885 const exponential_distribution& x); 886 887 template <class charT, class traits> 888 friend 889 basic_istream<charT, traits>& 890 operator>>(basic_istream<charT, traits>& is, 891 exponential_distribution& x); 892}; 893 894template<class RealType = double> 895class gamma_distribution 896{ 897public: 898 // types 899 typedef RealType result_type; 900 901 class param_type 902 { 903 public: 904 typedef gamma_distribution distribution_type; 905 906 explicit param_type(result_type alpha = 1, result_type beta = 1); 907 908 result_type alpha() const; 909 result_type beta() const; 910 911 friend bool operator==(const param_type& x, const param_type& y); 912 friend bool operator!=(const param_type& x, const param_type& y); 913 }; 914 915 // constructors and reset functions 916 explicit gamma_distribution(result_type alpha = 1, result_type beta = 1); 917 explicit gamma_distribution(const param_type& parm); 918 void reset(); 919 920 // generating functions 921 template<class URNG> result_type operator()(URNG& g); 922 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 923 924 // property functions 925 result_type alpha() const; 926 result_type beta() const; 927 928 param_type param() const; 929 void param(const param_type& parm); 930 931 result_type min() const; 932 result_type max() const; 933 934 friend bool operator==(const gamma_distribution& x, 935 const gamma_distribution& y); 936 friend bool operator!=(const gamma_distribution& x, 937 const gamma_distribution& y); 938 939 template <class charT, class traits> 940 friend 941 basic_ostream<charT, traits>& 942 operator<<(basic_ostream<charT, traits>& os, 943 const gamma_distribution& x); 944 945 template <class charT, class traits> 946 friend 947 basic_istream<charT, traits>& 948 operator>>(basic_istream<charT, traits>& is, 949 gamma_distribution& x); 950}; 951 952template<class RealType = double> 953class weibull_distribution 954{ 955public: 956 // types 957 typedef RealType result_type; 958 959 class param_type 960 { 961 public: 962 typedef weibull_distribution distribution_type; 963 964 explicit param_type(result_type alpha = 1, result_type beta = 1); 965 966 result_type a() const; 967 result_type b() const; 968 969 friend bool operator==(const param_type& x, const param_type& y); 970 friend bool operator!=(const param_type& x, const param_type& y); 971 }; 972 973 // constructor and reset functions 974 explicit weibull_distribution(result_type a = 1, result_type b = 1); 975 explicit weibull_distribution(const param_type& parm); 976 void reset(); 977 978 // generating functions 979 template<class URNG> result_type operator()(URNG& g); 980 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 981 982 // property functions 983 result_type a() const; 984 result_type b() const; 985 986 param_type param() const; 987 void param(const param_type& parm); 988 989 result_type min() const; 990 result_type max() const; 991 992 friend bool operator==(const weibull_distribution& x, 993 const weibull_distribution& y); 994 friend bool operator!=(const weibull_distribution& x, 995 const weibull_distribution& y); 996 997 template <class charT, class traits> 998 friend 999 basic_ostream<charT, traits>& 1000 operator<<(basic_ostream<charT, traits>& os, 1001 const weibull_distribution& x); 1002 1003 template <class charT, class traits> 1004 friend 1005 basic_istream<charT, traits>& 1006 operator>>(basic_istream<charT, traits>& is, 1007 weibull_distribution& x); 1008}; 1009 1010template<class RealType = double> 1011class extreme_value_distribution 1012{ 1013public: 1014 // types 1015 typedef RealType result_type; 1016 1017 class param_type 1018 { 1019 public: 1020 typedef extreme_value_distribution distribution_type; 1021 1022 explicit param_type(result_type a = 0, result_type b = 1); 1023 1024 result_type a() const; 1025 result_type b() const; 1026 1027 friend bool operator==(const param_type& x, const param_type& y); 1028 friend bool operator!=(const param_type& x, const param_type& y); 1029 }; 1030 1031 // constructor and reset functions 1032 explicit extreme_value_distribution(result_type a = 0, result_type b = 1); 1033 explicit extreme_value_distribution(const param_type& parm); 1034 void reset(); 1035 1036 // generating functions 1037 template<class URNG> result_type operator()(URNG& g); 1038 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 1039 1040 // property functions 1041 result_type a() const; 1042 result_type b() const; 1043 1044 param_type param() const; 1045 void param(const param_type& parm); 1046 1047 result_type min() const; 1048 result_type max() const; 1049 1050 friend bool operator==(const extreme_value_distribution& x, 1051 const extreme_value_distribution& y); 1052 friend bool operator!=(const extreme_value_distribution& x, 1053 const extreme_value_distribution& y); 1054 1055 template <class charT, class traits> 1056 friend 1057 basic_ostream<charT, traits>& 1058 operator<<(basic_ostream<charT, traits>& os, 1059 const extreme_value_distribution& x); 1060 1061 template <class charT, class traits> 1062 friend 1063 basic_istream<charT, traits>& 1064 operator>>(basic_istream<charT, traits>& is, 1065 extreme_value_distribution& x); 1066}; 1067 1068template<class RealType = double> 1069class normal_distribution 1070{ 1071public: 1072 // types 1073 typedef RealType result_type; 1074 1075 class param_type 1076 { 1077 public: 1078 typedef normal_distribution distribution_type; 1079 1080 explicit param_type(result_type mean = 0, result_type stddev = 1); 1081 1082 result_type mean() const; 1083 result_type stddev() const; 1084 1085 friend bool operator==(const param_type& x, const param_type& y); 1086 friend bool operator!=(const param_type& x, const param_type& y); 1087 }; 1088 1089 // constructors and reset functions 1090 explicit normal_distribution(result_type mean = 0, result_type stddev = 1); 1091 explicit normal_distribution(const param_type& parm); 1092 void reset(); 1093 1094 // generating functions 1095 template<class URNG> result_type operator()(URNG& g); 1096 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 1097 1098 // property functions 1099 result_type mean() const; 1100 result_type stddev() const; 1101 1102 param_type param() const; 1103 void param(const param_type& parm); 1104 1105 result_type min() const; 1106 result_type max() const; 1107 1108 friend bool operator==(const normal_distribution& x, 1109 const normal_distribution& y); 1110 friend bool operator!=(const normal_distribution& x, 1111 const normal_distribution& y); 1112 1113 template <class charT, class traits> 1114 friend 1115 basic_ostream<charT, traits>& 1116 operator<<(basic_ostream<charT, traits>& os, 1117 const normal_distribution& x); 1118 1119 template <class charT, class traits> 1120 friend 1121 basic_istream<charT, traits>& 1122 operator>>(basic_istream<charT, traits>& is, 1123 normal_distribution& x); 1124}; 1125 1126template<class RealType = double> 1127class lognormal_distribution 1128{ 1129public: 1130 // types 1131 typedef RealType result_type; 1132 1133 class param_type 1134 { 1135 public: 1136 typedef lognormal_distribution distribution_type; 1137 1138 explicit param_type(result_type m = 0, result_type s = 1); 1139 1140 result_type m() const; 1141 result_type s() const; 1142 1143 friend bool operator==(const param_type& x, const param_type& y); 1144 friend bool operator!=(const param_type& x, const param_type& y); 1145 }; 1146 1147 // constructor and reset functions 1148 explicit lognormal_distribution(result_type m = 0, result_type s = 1); 1149 explicit lognormal_distribution(const param_type& parm); 1150 void reset(); 1151 1152 // generating functions 1153 template<class URNG> result_type operator()(URNG& g); 1154 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 1155 1156 // property functions 1157 result_type m() const; 1158 result_type s() const; 1159 1160 param_type param() const; 1161 void param(const param_type& parm); 1162 1163 result_type min() const; 1164 result_type max() const; 1165 1166 friend bool operator==(const lognormal_distribution& x, 1167 const lognormal_distribution& y); 1168 friend bool operator!=(const lognormal_distribution& x, 1169 const lognormal_distribution& y); 1170 1171 template <class charT, class traits> 1172 friend 1173 basic_ostream<charT, traits>& 1174 operator<<(basic_ostream<charT, traits>& os, 1175 const lognormal_distribution& x); 1176 1177 template <class charT, class traits> 1178 friend 1179 basic_istream<charT, traits>& 1180 operator>>(basic_istream<charT, traits>& is, 1181 lognormal_distribution& x); 1182}; 1183 1184template<class RealType = double> 1185class chi_squared_distribution 1186{ 1187public: 1188 // types 1189 typedef RealType result_type; 1190 1191 class param_type 1192 { 1193 public: 1194 typedef chi_squared_distribution distribution_type; 1195 1196 explicit param_type(result_type n = 1); 1197 1198 result_type n() const; 1199 1200 friend bool operator==(const param_type& x, const param_type& y); 1201 friend bool operator!=(const param_type& x, const param_type& y); 1202 }; 1203 1204 // constructor and reset functions 1205 explicit chi_squared_distribution(result_type n = 1); 1206 explicit chi_squared_distribution(const param_type& parm); 1207 void reset(); 1208 1209 // generating functions 1210 template<class URNG> result_type operator()(URNG& g); 1211 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 1212 1213 // property functions 1214 result_type n() const; 1215 1216 param_type param() const; 1217 void param(const param_type& parm); 1218 1219 result_type min() const; 1220 result_type max() const; 1221 1222 friend bool operator==(const chi_squared_distribution& x, 1223 const chi_squared_distribution& y); 1224 friend bool operator!=(const chi_squared_distribution& x, 1225 const chi_squared_distribution& y); 1226 1227 template <class charT, class traits> 1228 friend 1229 basic_ostream<charT, traits>& 1230 operator<<(basic_ostream<charT, traits>& os, 1231 const chi_squared_distribution& x); 1232 1233 template <class charT, class traits> 1234 friend 1235 basic_istream<charT, traits>& 1236 operator>>(basic_istream<charT, traits>& is, 1237 chi_squared_distribution& x); 1238}; 1239 1240template<class RealType = double> 1241class cauchy_distribution 1242{ 1243public: 1244 // types 1245 typedef RealType result_type; 1246 1247 class param_type 1248 { 1249 public: 1250 typedef cauchy_distribution distribution_type; 1251 1252 explicit param_type(result_type a = 0, result_type b = 1); 1253 1254 result_type a() const; 1255 result_type b() const; 1256 1257 friend bool operator==(const param_type& x, const param_type& y); 1258 friend bool operator!=(const param_type& x, const param_type& y); 1259 }; 1260 1261 // constructor and reset functions 1262 explicit cauchy_distribution(result_type a = 0, result_type b = 1); 1263 explicit cauchy_distribution(const param_type& parm); 1264 void reset(); 1265 1266 // generating functions 1267 template<class URNG> result_type operator()(URNG& g); 1268 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 1269 1270 // property functions 1271 result_type a() const; 1272 result_type b() const; 1273 1274 param_type param() const; 1275 void param(const param_type& parm); 1276 1277 result_type min() const; 1278 result_type max() const; 1279 1280 friend bool operator==(const cauchy_distribution& x, 1281 const cauchy_distribution& y); 1282 friend bool operator!=(const cauchy_distribution& x, 1283 const cauchy_distribution& y); 1284 1285 template <class charT, class traits> 1286 friend 1287 basic_ostream<charT, traits>& 1288 operator<<(basic_ostream<charT, traits>& os, 1289 const cauchy_distribution& x); 1290 1291 template <class charT, class traits> 1292 friend 1293 basic_istream<charT, traits>& 1294 operator>>(basic_istream<charT, traits>& is, 1295 cauchy_distribution& x); 1296}; 1297 1298template<class RealType = double> 1299class fisher_f_distribution 1300{ 1301public: 1302 // types 1303 typedef RealType result_type; 1304 1305 class param_type 1306 { 1307 public: 1308 typedef fisher_f_distribution distribution_type; 1309 1310 explicit param_type(result_type m = 1, result_type n = 1); 1311 1312 result_type m() const; 1313 result_type n() const; 1314 1315 friend bool operator==(const param_type& x, const param_type& y); 1316 friend bool operator!=(const param_type& x, const param_type& y); 1317 }; 1318 1319 // constructor and reset functions 1320 explicit fisher_f_distribution(result_type m = 1, result_type n = 1); 1321 explicit fisher_f_distribution(const param_type& parm); 1322 void reset(); 1323 1324 // generating functions 1325 template<class URNG> result_type operator()(URNG& g); 1326 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 1327 1328 // property functions 1329 result_type m() const; 1330 result_type n() const; 1331 1332 param_type param() const; 1333 void param(const param_type& parm); 1334 1335 result_type min() const; 1336 result_type max() const; 1337 1338 friend bool operator==(const fisher_f_distribution& x, 1339 const fisher_f_distribution& y); 1340 friend bool operator!=(const fisher_f_distribution& x, 1341 const fisher_f_distribution& y); 1342 1343 template <class charT, class traits> 1344 friend 1345 basic_ostream<charT, traits>& 1346 operator<<(basic_ostream<charT, traits>& os, 1347 const fisher_f_distribution& x); 1348 1349 template <class charT, class traits> 1350 friend 1351 basic_istream<charT, traits>& 1352 operator>>(basic_istream<charT, traits>& is, 1353 fisher_f_distribution& x); 1354}; 1355 1356template<class RealType = double> 1357class student_t_distribution 1358{ 1359public: 1360 // types 1361 typedef RealType result_type; 1362 1363 class param_type 1364 { 1365 public: 1366 typedef student_t_distribution distribution_type; 1367 1368 explicit param_type(result_type n = 1); 1369 1370 result_type n() const; 1371 1372 friend bool operator==(const param_type& x, const param_type& y); 1373 friend bool operator!=(const param_type& x, const param_type& y); 1374 }; 1375 1376 // constructor and reset functions 1377 explicit student_t_distribution(result_type n = 1); 1378 explicit student_t_distribution(const param_type& parm); 1379 void reset(); 1380 1381 // generating functions 1382 template<class URNG> result_type operator()(URNG& g); 1383 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 1384 1385 // property functions 1386 result_type n() const; 1387 1388 param_type param() const; 1389 void param(const param_type& parm); 1390 1391 result_type min() const; 1392 result_type max() const; 1393 1394 friend bool operator==(const student_t_distribution& x, 1395 const student_t_distribution& y); 1396 friend bool operator!=(const student_t_distribution& x, 1397 const student_t_distribution& y); 1398 1399 template <class charT, class traits> 1400 friend 1401 basic_ostream<charT, traits>& 1402 operator<<(basic_ostream<charT, traits>& os, 1403 const student_t_distribution& x); 1404 1405 template <class charT, class traits> 1406 friend 1407 basic_istream<charT, traits>& 1408 operator>>(basic_istream<charT, traits>& is, 1409 student_t_distribution& x); 1410}; 1411 1412template<class IntType = int> 1413class discrete_distribution 1414{ 1415public: 1416 // types 1417 typedef IntType result_type; 1418 1419 class param_type 1420 { 1421 public: 1422 typedef discrete_distribution distribution_type; 1423 1424 param_type(); 1425 template<class InputIterator> 1426 param_type(InputIterator firstW, InputIterator lastW); 1427 param_type(initializer_list<double> wl); 1428 template<class UnaryOperation> 1429 param_type(size_t nw, double xmin, double xmax, UnaryOperation fw); 1430 1431 vector<double> probabilities() const; 1432 1433 friend bool operator==(const param_type& x, const param_type& y); 1434 friend bool operator!=(const param_type& x, const param_type& y); 1435 }; 1436 1437 // constructor and reset functions 1438 discrete_distribution(); 1439 template<class InputIterator> 1440 discrete_distribution(InputIterator firstW, InputIterator lastW); 1441 discrete_distribution(initializer_list<double> wl); 1442 template<class UnaryOperation> 1443 discrete_distribution(size_t nw, double xmin, double xmax, 1444 UnaryOperation fw); 1445 explicit discrete_distribution(const param_type& parm); 1446 void reset(); 1447 1448 // generating functions 1449 template<class URNG> result_type operator()(URNG& g); 1450 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 1451 1452 // property functions 1453 vector<double> probabilities() const; 1454 1455 param_type param() const; 1456 void param(const param_type& parm); 1457 1458 result_type min() const; 1459 result_type max() const; 1460 1461 friend bool operator==(const discrete_distribution& x, 1462 const discrete_distribution& y); 1463 friend bool operator!=(const discrete_distribution& x, 1464 const discrete_distribution& y); 1465 1466 template <class charT, class traits> 1467 friend 1468 basic_ostream<charT, traits>& 1469 operator<<(basic_ostream<charT, traits>& os, 1470 const discrete_distribution& x); 1471 1472 template <class charT, class traits> 1473 friend 1474 basic_istream<charT, traits>& 1475 operator>>(basic_istream<charT, traits>& is, 1476 discrete_distribution& x); 1477}; 1478 1479template<class RealType = double> 1480class piecewise_constant_distribution 1481{ 1482 // types 1483 typedef RealType result_type; 1484 1485 class param_type 1486 { 1487 public: 1488 typedef piecewise_constant_distribution distribution_type; 1489 1490 param_type(); 1491 template<class InputIteratorB, class InputIteratorW> 1492 param_type(InputIteratorB firstB, InputIteratorB lastB, 1493 InputIteratorW firstW); 1494 template<class UnaryOperation> 1495 param_type(initializer_list<result_type> bl, UnaryOperation fw); 1496 template<class UnaryOperation> 1497 param_type(size_t nw, result_type xmin, result_type xmax, 1498 UnaryOperation fw); 1499 1500 vector<result_type> intervals() const; 1501 vector<result_type> densities() const; 1502 1503 friend bool operator==(const param_type& x, const param_type& y); 1504 friend bool operator!=(const param_type& x, const param_type& y); 1505 }; 1506 1507 // constructor and reset functions 1508 piecewise_constant_distribution(); 1509 template<class InputIteratorB, class InputIteratorW> 1510 piecewise_constant_distribution(InputIteratorB firstB, 1511 InputIteratorB lastB, 1512 InputIteratorW firstW); 1513 template<class UnaryOperation> 1514 piecewise_constant_distribution(initializer_list<result_type> bl, 1515 UnaryOperation fw); 1516 template<class UnaryOperation> 1517 piecewise_constant_distribution(size_t nw, result_type xmin, 1518 result_type xmax, UnaryOperation fw); 1519 explicit piecewise_constant_distribution(const param_type& parm); 1520 void reset(); 1521 1522 // generating functions 1523 template<class URNG> result_type operator()(URNG& g); 1524 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 1525 1526 // property functions 1527 vector<result_type> intervals() const; 1528 vector<result_type> densities() const; 1529 1530 param_type param() const; 1531 void param(const param_type& parm); 1532 1533 result_type min() const; 1534 result_type max() const; 1535 1536 friend bool operator==(const piecewise_constant_distribution& x, 1537 const piecewise_constant_distribution& y); 1538 friend bool operator!=(const piecewise_constant_distribution& x, 1539 const piecewise_constant_distribution& y); 1540 1541 template <class charT, class traits> 1542 friend 1543 basic_ostream<charT, traits>& 1544 operator<<(basic_ostream<charT, traits>& os, 1545 const piecewise_constant_distribution& x); 1546 1547 template <class charT, class traits> 1548 friend 1549 basic_istream<charT, traits>& 1550 operator>>(basic_istream<charT, traits>& is, 1551 piecewise_constant_distribution& x); 1552}; 1553 1554template<class RealType = double> 1555class piecewise_linear_distribution 1556{ 1557 // types 1558 typedef RealType result_type; 1559 1560 class param_type 1561 { 1562 public: 1563 typedef piecewise_linear_distribution distribution_type; 1564 1565 param_type(); 1566 template<class InputIteratorB, class InputIteratorW> 1567 param_type(InputIteratorB firstB, InputIteratorB lastB, 1568 InputIteratorW firstW); 1569 template<class UnaryOperation> 1570 param_type(initializer_list<result_type> bl, UnaryOperation fw); 1571 template<class UnaryOperation> 1572 param_type(size_t nw, result_type xmin, result_type xmax, 1573 UnaryOperation fw); 1574 1575 vector<result_type> intervals() const; 1576 vector<result_type> densities() const; 1577 1578 friend bool operator==(const param_type& x, const param_type& y); 1579 friend bool operator!=(const param_type& x, const param_type& y); 1580 }; 1581 1582 // constructor and reset functions 1583 piecewise_linear_distribution(); 1584 template<class InputIteratorB, class InputIteratorW> 1585 piecewise_linear_distribution(InputIteratorB firstB, 1586 InputIteratorB lastB, 1587 InputIteratorW firstW); 1588 1589 template<class UnaryOperation> 1590 piecewise_linear_distribution(initializer_list<result_type> bl, 1591 UnaryOperation fw); 1592 1593 template<class UnaryOperation> 1594 piecewise_linear_distribution(size_t nw, result_type xmin, 1595 result_type xmax, UnaryOperation fw); 1596 1597 explicit piecewise_linear_distribution(const param_type& parm); 1598 void reset(); 1599 1600 // generating functions 1601 template<class URNG> result_type operator()(URNG& g); 1602 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 1603 1604 // property functions 1605 vector<result_type> intervals() const; 1606 vector<result_type> densities() const; 1607 1608 param_type param() const; 1609 void param(const param_type& parm); 1610 1611 result_type min() const; 1612 result_type max() const; 1613 1614 friend bool operator==(const piecewise_linear_distribution& x, 1615 const piecewise_linear_distribution& y); 1616 friend bool operator!=(const piecewise_linear_distribution& x, 1617 const piecewise_linear_distribution& y); 1618 1619 template <class charT, class traits> 1620 friend 1621 basic_ostream<charT, traits>& 1622 operator<<(basic_ostream<charT, traits>& os, 1623 const piecewise_linear_distribution& x); 1624 1625 template <class charT, class traits> 1626 friend 1627 basic_istream<charT, traits>& 1628 operator>>(basic_istream<charT, traits>& is, 1629 piecewise_linear_distribution& x); 1630}; 1631 1632} // std 1633*/ 1634 1635#include <__config> 1636#include <cstddef> 1637#include <cstdint> 1638#include <cmath> 1639#include <type_traits> 1640#include <initializer_list> 1641#include <limits> 1642#include <algorithm> 1643#include <numeric> 1644#include <vector> 1645#include <string> 1646#include <istream> 1647#include <ostream> 1648 1649#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 1650#pragma GCC system_header 1651#endif 1652 1653_LIBCPP_PUSH_MACROS 1654#include <__undef_macros> 1655 1656 1657_LIBCPP_BEGIN_NAMESPACE_STD 1658 1659// __is_seed_sequence 1660 1661template <class _Sseq, class _Engine> 1662struct __is_seed_sequence 1663{ 1664 static _LIBCPP_CONSTEXPR const bool value = 1665 !is_convertible<_Sseq, typename _Engine::result_type>::value && 1666 !is_same<typename remove_cv<_Sseq>::type, _Engine>::value; 1667}; 1668 1669// linear_congruential_engine 1670 1671template <unsigned long long __a, unsigned long long __c, 1672 unsigned long long __m, unsigned long long _Mp, 1673 bool _MightOverflow = (__a != 0 && __m != 0 && __m-1 > (_Mp-__c)/__a)> 1674struct __lce_ta; 1675 1676// 64 1677 1678template <unsigned long long __a, unsigned long long __c, unsigned long long __m> 1679struct __lce_ta<__a, __c, __m, (unsigned long long)(~0), true> 1680{ 1681 typedef unsigned long long result_type; 1682 _LIBCPP_INLINE_VISIBILITY 1683 static result_type next(result_type __x) 1684 { 1685 // Schrage's algorithm 1686 const result_type __q = __m / __a; 1687 const result_type __r = __m % __a; 1688 const result_type __t0 = __a * (__x % __q); 1689 const result_type __t1 = __r * (__x / __q); 1690 __x = __t0 + (__t0 < __t1) * __m - __t1; 1691 __x += __c - (__x >= __m - __c) * __m; 1692 return __x; 1693 } 1694}; 1695 1696template <unsigned long long __a, unsigned long long __m> 1697struct __lce_ta<__a, 0, __m, (unsigned long long)(~0), true> 1698{ 1699 typedef unsigned long long result_type; 1700 _LIBCPP_INLINE_VISIBILITY 1701 static result_type next(result_type __x) 1702 { 1703 // Schrage's algorithm 1704 const result_type __q = __m / __a; 1705 const result_type __r = __m % __a; 1706 const result_type __t0 = __a * (__x % __q); 1707 const result_type __t1 = __r * (__x / __q); 1708 __x = __t0 + (__t0 < __t1) * __m - __t1; 1709 return __x; 1710 } 1711}; 1712 1713template <unsigned long long __a, unsigned long long __c, unsigned long long __m> 1714struct __lce_ta<__a, __c, __m, (unsigned long long)(~0), false> 1715{ 1716 typedef unsigned long long result_type; 1717 _LIBCPP_INLINE_VISIBILITY 1718 static result_type next(result_type __x) 1719 { 1720 return (__a * __x + __c) % __m; 1721 } 1722}; 1723 1724template <unsigned long long __a, unsigned long long __c> 1725struct __lce_ta<__a, __c, 0, (unsigned long long)(~0), false> 1726{ 1727 typedef unsigned long long result_type; 1728 _LIBCPP_INLINE_VISIBILITY 1729 static result_type next(result_type __x) 1730 { 1731 return __a * __x + __c; 1732 } 1733}; 1734 1735// 32 1736 1737template <unsigned long long _Ap, unsigned long long _Cp, unsigned long long _Mp> 1738struct __lce_ta<_Ap, _Cp, _Mp, unsigned(~0), true> 1739{ 1740 typedef unsigned result_type; 1741 _LIBCPP_INLINE_VISIBILITY 1742 static result_type next(result_type __x) 1743 { 1744 const result_type __a = static_cast<result_type>(_Ap); 1745 const result_type __c = static_cast<result_type>(_Cp); 1746 const result_type __m = static_cast<result_type>(_Mp); 1747 // Schrage's algorithm 1748 const result_type __q = __m / __a; 1749 const result_type __r = __m % __a; 1750 const result_type __t0 = __a * (__x % __q); 1751 const result_type __t1 = __r * (__x / __q); 1752 __x = __t0 + (__t0 < __t1) * __m - __t1; 1753 __x += __c - (__x >= __m - __c) * __m; 1754 return __x; 1755 } 1756}; 1757 1758template <unsigned long long _Ap, unsigned long long _Mp> 1759struct __lce_ta<_Ap, 0, _Mp, unsigned(~0), true> 1760{ 1761 typedef unsigned result_type; 1762 _LIBCPP_INLINE_VISIBILITY 1763 static result_type next(result_type __x) 1764 { 1765 const result_type __a = static_cast<result_type>(_Ap); 1766 const result_type __m = static_cast<result_type>(_Mp); 1767 // Schrage's algorithm 1768 const result_type __q = __m / __a; 1769 const result_type __r = __m % __a; 1770 const result_type __t0 = __a * (__x % __q); 1771 const result_type __t1 = __r * (__x / __q); 1772 __x = __t0 + (__t0 < __t1) * __m - __t1; 1773 return __x; 1774 } 1775}; 1776 1777template <unsigned long long _Ap, unsigned long long _Cp, unsigned long long _Mp> 1778struct __lce_ta<_Ap, _Cp, _Mp, unsigned(~0), false> 1779{ 1780 typedef unsigned result_type; 1781 _LIBCPP_INLINE_VISIBILITY 1782 static result_type next(result_type __x) 1783 { 1784 const result_type __a = static_cast<result_type>(_Ap); 1785 const result_type __c = static_cast<result_type>(_Cp); 1786 const result_type __m = static_cast<result_type>(_Mp); 1787 return (__a * __x + __c) % __m; 1788 } 1789}; 1790 1791template <unsigned long long _Ap, unsigned long long _Cp> 1792struct __lce_ta<_Ap, _Cp, 0, unsigned(~0), false> 1793{ 1794 typedef unsigned result_type; 1795 _LIBCPP_INLINE_VISIBILITY 1796 static result_type next(result_type __x) 1797 { 1798 const result_type __a = static_cast<result_type>(_Ap); 1799 const result_type __c = static_cast<result_type>(_Cp); 1800 return __a * __x + __c; 1801 } 1802}; 1803 1804// 16 1805 1806template <unsigned long long __a, unsigned long long __c, unsigned long long __m, bool __b> 1807struct __lce_ta<__a, __c, __m, (unsigned short)(~0), __b> 1808{ 1809 typedef unsigned short result_type; 1810 _LIBCPP_INLINE_VISIBILITY 1811 static result_type next(result_type __x) 1812 { 1813 return static_cast<result_type>(__lce_ta<__a, __c, __m, unsigned(~0)>::next(__x)); 1814 } 1815}; 1816 1817template <class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m> 1818class _LIBCPP_TEMPLATE_VIS linear_congruential_engine; 1819 1820template <class _CharT, class _Traits, 1821 class _Up, _Up _Ap, _Up _Cp, _Up _Np> 1822_LIBCPP_INLINE_VISIBILITY 1823basic_ostream<_CharT, _Traits>& 1824operator<<(basic_ostream<_CharT, _Traits>& __os, 1825 const linear_congruential_engine<_Up, _Ap, _Cp, _Np>&); 1826 1827template <class _CharT, class _Traits, 1828 class _Up, _Up _Ap, _Up _Cp, _Up _Np> 1829basic_istream<_CharT, _Traits>& 1830operator>>(basic_istream<_CharT, _Traits>& __is, 1831 linear_congruential_engine<_Up, _Ap, _Cp, _Np>& __x); 1832 1833template <class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m> 1834class _LIBCPP_TEMPLATE_VIS linear_congruential_engine 1835{ 1836public: 1837 // types 1838 typedef _UIntType result_type; 1839 1840private: 1841 result_type __x_; 1842 1843 static _LIBCPP_CONSTEXPR const result_type _Mp = result_type(~0); 1844 1845 static_assert(__m == 0 || __a < __m, "linear_congruential_engine invalid parameters"); 1846 static_assert(__m == 0 || __c < __m, "linear_congruential_engine invalid parameters"); 1847public: 1848 static _LIBCPP_CONSTEXPR const result_type _Min = __c == 0u ? 1u: 0u; 1849 static _LIBCPP_CONSTEXPR const result_type _Max = __m - 1u; 1850 static_assert(_Min < _Max, "linear_congruential_engine invalid parameters"); 1851 1852 // engine characteristics 1853 static _LIBCPP_CONSTEXPR const result_type multiplier = __a; 1854 static _LIBCPP_CONSTEXPR const result_type increment = __c; 1855 static _LIBCPP_CONSTEXPR const result_type modulus = __m; 1856 _LIBCPP_INLINE_VISIBILITY 1857 static _LIBCPP_CONSTEXPR result_type min() {return _Min;} 1858 _LIBCPP_INLINE_VISIBILITY 1859 static _LIBCPP_CONSTEXPR result_type max() {return _Max;} 1860 static _LIBCPP_CONSTEXPR const result_type default_seed = 1u; 1861 1862 // constructors and seeding functions 1863 _LIBCPP_INLINE_VISIBILITY 1864 explicit linear_congruential_engine(result_type __s = default_seed) 1865 {seed(__s);} 1866 template<class _Sseq> 1867 _LIBCPP_INLINE_VISIBILITY 1868 explicit linear_congruential_engine(_Sseq& __q, 1869 typename enable_if<__is_seed_sequence<_Sseq, linear_congruential_engine>::value>::type* = 0) 1870 {seed(__q);} 1871 _LIBCPP_INLINE_VISIBILITY 1872 void seed(result_type __s = default_seed) 1873 {seed(integral_constant<bool, __m == 0>(), 1874 integral_constant<bool, __c == 0>(), __s);} 1875 template<class _Sseq> 1876 _LIBCPP_INLINE_VISIBILITY 1877 typename enable_if 1878 < 1879 __is_seed_sequence<_Sseq, linear_congruential_engine>::value, 1880 void 1881 >::type 1882 seed(_Sseq& __q) 1883 {__seed(__q, integral_constant<unsigned, 1884 1 + (__m == 0 ? (sizeof(result_type) * __CHAR_BIT__ - 1)/32 1885 : (__m > 0x100000000ull))>());} 1886 1887 // generating functions 1888 _LIBCPP_INLINE_VISIBILITY 1889 result_type operator()() 1890 {return __x_ = static_cast<result_type>(__lce_ta<__a, __c, __m, _Mp>::next(__x_));} 1891 _LIBCPP_INLINE_VISIBILITY 1892 void discard(unsigned long long __z) {for (; __z; --__z) operator()();} 1893 1894 friend _LIBCPP_INLINE_VISIBILITY 1895 bool operator==(const linear_congruential_engine& __x, 1896 const linear_congruential_engine& __y) 1897 {return __x.__x_ == __y.__x_;} 1898 friend _LIBCPP_INLINE_VISIBILITY 1899 bool operator!=(const linear_congruential_engine& __x, 1900 const linear_congruential_engine& __y) 1901 {return !(__x == __y);} 1902 1903private: 1904 1905 _LIBCPP_INLINE_VISIBILITY 1906 void seed(true_type, true_type, result_type __s) {__x_ = __s == 0 ? 1 : __s;} 1907 _LIBCPP_INLINE_VISIBILITY 1908 void seed(true_type, false_type, result_type __s) {__x_ = __s;} 1909 _LIBCPP_INLINE_VISIBILITY 1910 void seed(false_type, true_type, result_type __s) {__x_ = __s % __m == 0 ? 1911 1 : __s % __m;} 1912 _LIBCPP_INLINE_VISIBILITY 1913 void seed(false_type, false_type, result_type __s) {__x_ = __s % __m;} 1914 1915 template<class _Sseq> 1916 void __seed(_Sseq& __q, integral_constant<unsigned, 1>); 1917 template<class _Sseq> 1918 void __seed(_Sseq& __q, integral_constant<unsigned, 2>); 1919 1920 template <class _CharT, class _Traits, 1921 class _Up, _Up _Ap, _Up _Cp, _Up _Np> 1922 friend 1923 basic_ostream<_CharT, _Traits>& 1924 operator<<(basic_ostream<_CharT, _Traits>& __os, 1925 const linear_congruential_engine<_Up, _Ap, _Cp, _Np>&); 1926 1927 template <class _CharT, class _Traits, 1928 class _Up, _Up _Ap, _Up _Cp, _Up _Np> 1929 friend 1930 basic_istream<_CharT, _Traits>& 1931 operator>>(basic_istream<_CharT, _Traits>& __is, 1932 linear_congruential_engine<_Up, _Ap, _Cp, _Np>& __x); 1933}; 1934 1935template <class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m> 1936 _LIBCPP_CONSTEXPR const typename linear_congruential_engine<_UIntType, __a, __c, __m>::result_type 1937 linear_congruential_engine<_UIntType, __a, __c, __m>::multiplier; 1938 1939template <class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m> 1940 _LIBCPP_CONSTEXPR const typename linear_congruential_engine<_UIntType, __a, __c, __m>::result_type 1941 linear_congruential_engine<_UIntType, __a, __c, __m>::increment; 1942 1943template <class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m> 1944 _LIBCPP_CONSTEXPR const typename linear_congruential_engine<_UIntType, __a, __c, __m>::result_type 1945 linear_congruential_engine<_UIntType, __a, __c, __m>::modulus; 1946 1947template <class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m> 1948 _LIBCPP_CONSTEXPR const typename linear_congruential_engine<_UIntType, __a, __c, __m>::result_type 1949 linear_congruential_engine<_UIntType, __a, __c, __m>::default_seed; 1950 1951template <class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m> 1952template<class _Sseq> 1953void 1954linear_congruential_engine<_UIntType, __a, __c, __m>::__seed(_Sseq& __q, 1955 integral_constant<unsigned, 1>) 1956{ 1957 const unsigned __k = 1; 1958 uint32_t __ar[__k+3]; 1959 __q.generate(__ar, __ar + __k + 3); 1960 result_type __s = static_cast<result_type>(__ar[3] % __m); 1961 __x_ = __c == 0 && __s == 0 ? result_type(1) : __s; 1962} 1963 1964template <class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m> 1965template<class _Sseq> 1966void 1967linear_congruential_engine<_UIntType, __a, __c, __m>::__seed(_Sseq& __q, 1968 integral_constant<unsigned, 2>) 1969{ 1970 const unsigned __k = 2; 1971 uint32_t __ar[__k+3]; 1972 __q.generate(__ar, __ar + __k + 3); 1973 result_type __s = static_cast<result_type>((__ar[3] + 1974 ((uint64_t)__ar[4] << 32)) % __m); 1975 __x_ = __c == 0 && __s == 0 ? result_type(1) : __s; 1976} 1977 1978template <class _CharT, class _Traits, 1979 class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m> 1980inline _LIBCPP_INLINE_VISIBILITY 1981basic_ostream<_CharT, _Traits>& 1982operator<<(basic_ostream<_CharT, _Traits>& __os, 1983 const linear_congruential_engine<_UIntType, __a, __c, __m>& __x) 1984{ 1985 __save_flags<_CharT, _Traits> __lx(__os); 1986 __os.flags(ios_base::dec | ios_base::left); 1987 __os.fill(__os.widen(' ')); 1988 return __os << __x.__x_; 1989} 1990 1991template <class _CharT, class _Traits, 1992 class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m> 1993basic_istream<_CharT, _Traits>& 1994operator>>(basic_istream<_CharT, _Traits>& __is, 1995 linear_congruential_engine<_UIntType, __a, __c, __m>& __x) 1996{ 1997 __save_flags<_CharT, _Traits> __lx(__is); 1998 __is.flags(ios_base::dec | ios_base::skipws); 1999 _UIntType __t; 2000 __is >> __t; 2001 if (!__is.fail()) 2002 __x.__x_ = __t; 2003 return __is; 2004} 2005 2006typedef linear_congruential_engine<uint_fast32_t, 16807, 0, 2147483647> 2007 minstd_rand0; 2008typedef linear_congruential_engine<uint_fast32_t, 48271, 0, 2147483647> 2009 minstd_rand; 2010typedef minstd_rand default_random_engine; 2011// mersenne_twister_engine 2012 2013template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2014 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2015 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2016class _LIBCPP_TEMPLATE_VIS mersenne_twister_engine; 2017 2018template <class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2019 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2020 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2021bool 2022operator==(const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2023 _Bp, _Tp, _Cp, _Lp, _Fp>& __x, 2024 const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2025 _Bp, _Tp, _Cp, _Lp, _Fp>& __y); 2026 2027template <class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2028 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2029 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2030_LIBCPP_INLINE_VISIBILITY 2031bool 2032operator!=(const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2033 _Bp, _Tp, _Cp, _Lp, _Fp>& __x, 2034 const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2035 _Bp, _Tp, _Cp, _Lp, _Fp>& __y); 2036 2037template <class _CharT, class _Traits, 2038 class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2039 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2040 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2041basic_ostream<_CharT, _Traits>& 2042operator<<(basic_ostream<_CharT, _Traits>& __os, 2043 const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2044 _Bp, _Tp, _Cp, _Lp, _Fp>& __x); 2045 2046template <class _CharT, class _Traits, 2047 class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2048 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2049 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2050basic_istream<_CharT, _Traits>& 2051operator>>(basic_istream<_CharT, _Traits>& __is, 2052 mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2053 _Bp, _Tp, _Cp, _Lp, _Fp>& __x); 2054 2055template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2056 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2057 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2058class _LIBCPP_TEMPLATE_VIS mersenne_twister_engine 2059{ 2060public: 2061 // types 2062 typedef _UIntType result_type; 2063 2064private: 2065 result_type __x_[__n]; 2066 size_t __i_; 2067 2068 static_assert( 0 < __m, "mersenne_twister_engine invalid parameters"); 2069 static_assert(__m <= __n, "mersenne_twister_engine invalid parameters"); 2070 static _LIBCPP_CONSTEXPR const result_type _Dt = numeric_limits<result_type>::digits; 2071 static_assert(__w <= _Dt, "mersenne_twister_engine invalid parameters"); 2072 static_assert( 2 <= __w, "mersenne_twister_engine invalid parameters"); 2073 static_assert(__r <= __w, "mersenne_twister_engine invalid parameters"); 2074 static_assert(__u <= __w, "mersenne_twister_engine invalid parameters"); 2075 static_assert(__s <= __w, "mersenne_twister_engine invalid parameters"); 2076 static_assert(__t <= __w, "mersenne_twister_engine invalid parameters"); 2077 static_assert(__l <= __w, "mersenne_twister_engine invalid parameters"); 2078public: 2079 static _LIBCPP_CONSTEXPR const result_type _Min = 0; 2080 static _LIBCPP_CONSTEXPR const result_type _Max = __w == _Dt ? result_type(~0) : 2081 (result_type(1) << __w) - result_type(1); 2082 static_assert(_Min < _Max, "mersenne_twister_engine invalid parameters"); 2083 static_assert(__a <= _Max, "mersenne_twister_engine invalid parameters"); 2084 static_assert(__b <= _Max, "mersenne_twister_engine invalid parameters"); 2085 static_assert(__c <= _Max, "mersenne_twister_engine invalid parameters"); 2086 static_assert(__d <= _Max, "mersenne_twister_engine invalid parameters"); 2087 static_assert(__f <= _Max, "mersenne_twister_engine invalid parameters"); 2088 2089 // engine characteristics 2090 static _LIBCPP_CONSTEXPR const size_t word_size = __w; 2091 static _LIBCPP_CONSTEXPR const size_t state_size = __n; 2092 static _LIBCPP_CONSTEXPR const size_t shift_size = __m; 2093 static _LIBCPP_CONSTEXPR const size_t mask_bits = __r; 2094 static _LIBCPP_CONSTEXPR const result_type xor_mask = __a; 2095 static _LIBCPP_CONSTEXPR const size_t tempering_u = __u; 2096 static _LIBCPP_CONSTEXPR const result_type tempering_d = __d; 2097 static _LIBCPP_CONSTEXPR const size_t tempering_s = __s; 2098 static _LIBCPP_CONSTEXPR const result_type tempering_b = __b; 2099 static _LIBCPP_CONSTEXPR const size_t tempering_t = __t; 2100 static _LIBCPP_CONSTEXPR const result_type tempering_c = __c; 2101 static _LIBCPP_CONSTEXPR const size_t tempering_l = __l; 2102 static _LIBCPP_CONSTEXPR const result_type initialization_multiplier = __f; 2103 _LIBCPP_INLINE_VISIBILITY 2104 static _LIBCPP_CONSTEXPR result_type min() { return _Min; } 2105 _LIBCPP_INLINE_VISIBILITY 2106 static _LIBCPP_CONSTEXPR result_type max() { return _Max; } 2107 static _LIBCPP_CONSTEXPR const result_type default_seed = 5489u; 2108 2109 // constructors and seeding functions 2110 _LIBCPP_INLINE_VISIBILITY 2111 explicit mersenne_twister_engine(result_type __sd = default_seed) 2112 {seed(__sd);} 2113 template<class _Sseq> 2114 _LIBCPP_INLINE_VISIBILITY 2115 explicit mersenne_twister_engine(_Sseq& __q, 2116 typename enable_if<__is_seed_sequence<_Sseq, mersenne_twister_engine>::value>::type* = 0) 2117 {seed(__q);} 2118 void seed(result_type __sd = default_seed); 2119 template<class _Sseq> 2120 _LIBCPP_INLINE_VISIBILITY 2121 typename enable_if 2122 < 2123 __is_seed_sequence<_Sseq, mersenne_twister_engine>::value, 2124 void 2125 >::type 2126 seed(_Sseq& __q) 2127 {__seed(__q, integral_constant<unsigned, 1 + (__w - 1) / 32>());} 2128 2129 // generating functions 2130 result_type operator()(); 2131 _LIBCPP_INLINE_VISIBILITY 2132 void discard(unsigned long long __z) {for (; __z; --__z) operator()();} 2133 2134 template <class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2135 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2136 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2137 friend 2138 bool 2139 operator==(const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2140 _Bp, _Tp, _Cp, _Lp, _Fp>& __x, 2141 const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2142 _Bp, _Tp, _Cp, _Lp, _Fp>& __y); 2143 2144 template <class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2145 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2146 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2147 friend 2148 bool 2149 operator!=(const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2150 _Bp, _Tp, _Cp, _Lp, _Fp>& __x, 2151 const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2152 _Bp, _Tp, _Cp, _Lp, _Fp>& __y); 2153 2154 template <class _CharT, class _Traits, 2155 class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2156 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2157 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2158 friend 2159 basic_ostream<_CharT, _Traits>& 2160 operator<<(basic_ostream<_CharT, _Traits>& __os, 2161 const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2162 _Bp, _Tp, _Cp, _Lp, _Fp>& __x); 2163 2164 template <class _CharT, class _Traits, 2165 class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2166 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2167 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2168 friend 2169 basic_istream<_CharT, _Traits>& 2170 operator>>(basic_istream<_CharT, _Traits>& __is, 2171 mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2172 _Bp, _Tp, _Cp, _Lp, _Fp>& __x); 2173private: 2174 2175 template<class _Sseq> 2176 void __seed(_Sseq& __q, integral_constant<unsigned, 1>); 2177 template<class _Sseq> 2178 void __seed(_Sseq& __q, integral_constant<unsigned, 2>); 2179 2180 template <size_t __count> 2181 _LIBCPP_INLINE_VISIBILITY 2182 static 2183 typename enable_if 2184 < 2185 __count < __w, 2186 result_type 2187 >::type 2188 __lshift(result_type __x) {return (__x << __count) & _Max;} 2189 2190 template <size_t __count> 2191 _LIBCPP_INLINE_VISIBILITY 2192 static 2193 typename enable_if 2194 < 2195 (__count >= __w), 2196 result_type 2197 >::type 2198 __lshift(result_type) {return result_type(0);} 2199 2200 template <size_t __count> 2201 _LIBCPP_INLINE_VISIBILITY 2202 static 2203 typename enable_if 2204 < 2205 __count < _Dt, 2206 result_type 2207 >::type 2208 __rshift(result_type __x) {return __x >> __count;} 2209 2210 template <size_t __count> 2211 _LIBCPP_INLINE_VISIBILITY 2212 static 2213 typename enable_if 2214 < 2215 (__count >= _Dt), 2216 result_type 2217 >::type 2218 __rshift(result_type) {return result_type(0);} 2219}; 2220 2221template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2222 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2223 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2224 _LIBCPP_CONSTEXPR const size_t 2225 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::word_size; 2226 2227template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2228 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2229 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2230 _LIBCPP_CONSTEXPR const size_t 2231 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::state_size; 2232 2233template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2234 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2235 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2236 _LIBCPP_CONSTEXPR const size_t 2237 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::shift_size; 2238 2239template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2240 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2241 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2242 _LIBCPP_CONSTEXPR const size_t 2243 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::mask_bits; 2244 2245template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2246 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2247 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2248 _LIBCPP_CONSTEXPR const typename mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::result_type 2249 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::xor_mask; 2250 2251template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2252 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2253 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2254 _LIBCPP_CONSTEXPR const size_t 2255 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::tempering_u; 2256 2257template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2258 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2259 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2260 _LIBCPP_CONSTEXPR const typename mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::result_type 2261 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::tempering_d; 2262 2263template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2264 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2265 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2266 _LIBCPP_CONSTEXPR const size_t 2267 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::tempering_s; 2268 2269template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2270 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2271 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2272 _LIBCPP_CONSTEXPR const typename mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::result_type 2273 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::tempering_b; 2274 2275template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2276 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2277 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2278 _LIBCPP_CONSTEXPR const size_t 2279 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::tempering_t; 2280 2281template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2282 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2283 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2284 _LIBCPP_CONSTEXPR const typename mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::result_type 2285 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::tempering_c; 2286 2287template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2288 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2289 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2290 _LIBCPP_CONSTEXPR const size_t 2291 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::tempering_l; 2292 2293template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2294 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2295 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2296 _LIBCPP_CONSTEXPR const typename mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::result_type 2297 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::initialization_multiplier; 2298 2299template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2300 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2301 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2302 _LIBCPP_CONSTEXPR const typename mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::result_type 2303 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::default_seed; 2304 2305template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2306 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2307 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2308void 2309mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, 2310 __t, __c, __l, __f>::seed(result_type __sd) 2311 _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 2312{ // __w >= 2 2313 __x_[0] = __sd & _Max; 2314 for (size_t __i = 1; __i < __n; ++__i) 2315 __x_[__i] = (__f * (__x_[__i-1] ^ __rshift<__w - 2>(__x_[__i-1])) + __i) & _Max; 2316 __i_ = 0; 2317} 2318 2319template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2320 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2321 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2322template<class _Sseq> 2323void 2324mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, 2325 __t, __c, __l, __f>::__seed(_Sseq& __q, integral_constant<unsigned, 1>) 2326{ 2327 const unsigned __k = 1; 2328 uint32_t __ar[__n * __k]; 2329 __q.generate(__ar, __ar + __n * __k); 2330 for (size_t __i = 0; __i < __n; ++__i) 2331 __x_[__i] = static_cast<result_type>(__ar[__i] & _Max); 2332 const result_type __mask = __r == _Dt ? result_type(~0) : 2333 (result_type(1) << __r) - result_type(1); 2334 __i_ = 0; 2335 if ((__x_[0] & ~__mask) == 0) 2336 { 2337 for (size_t __i = 1; __i < __n; ++__i) 2338 if (__x_[__i] != 0) 2339 return; 2340 __x_[0] = result_type(1) << (__w - 1); 2341 } 2342} 2343 2344template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2345 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2346 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2347template<class _Sseq> 2348void 2349mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, 2350 __t, __c, __l, __f>::__seed(_Sseq& __q, integral_constant<unsigned, 2>) 2351{ 2352 const unsigned __k = 2; 2353 uint32_t __ar[__n * __k]; 2354 __q.generate(__ar, __ar + __n * __k); 2355 for (size_t __i = 0; __i < __n; ++__i) 2356 __x_[__i] = static_cast<result_type>( 2357 (__ar[2 * __i] + ((uint64_t)__ar[2 * __i + 1] << 32)) & _Max); 2358 const result_type __mask = __r == _Dt ? result_type(~0) : 2359 (result_type(1) << __r) - result_type(1); 2360 __i_ = 0; 2361 if ((__x_[0] & ~__mask) == 0) 2362 { 2363 for (size_t __i = 1; __i < __n; ++__i) 2364 if (__x_[__i] != 0) 2365 return; 2366 __x_[0] = result_type(1) << (__w - 1); 2367 } 2368} 2369 2370template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2371 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2372 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2373_UIntType 2374mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, 2375 __t, __c, __l, __f>::operator()() 2376{ 2377 const size_t __j = (__i_ + 1) % __n; 2378 const result_type __mask = __r == _Dt ? result_type(~0) : 2379 (result_type(1) << __r) - result_type(1); 2380 const result_type _Yp = (__x_[__i_] & ~__mask) | (__x_[__j] & __mask); 2381 const size_t __k = (__i_ + __m) % __n; 2382 __x_[__i_] = __x_[__k] ^ __rshift<1>(_Yp) ^ (__a * (_Yp & 1)); 2383 result_type __z = __x_[__i_] ^ (__rshift<__u>(__x_[__i_]) & __d); 2384 __i_ = __j; 2385 __z ^= __lshift<__s>(__z) & __b; 2386 __z ^= __lshift<__t>(__z) & __c; 2387 return __z ^ __rshift<__l>(__z); 2388} 2389 2390template <class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2391 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2392 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2393bool 2394operator==(const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2395 _Bp, _Tp, _Cp, _Lp, _Fp>& __x, 2396 const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2397 _Bp, _Tp, _Cp, _Lp, _Fp>& __y) 2398{ 2399 if (__x.__i_ == __y.__i_) 2400 return _VSTD::equal(__x.__x_, __x.__x_ + _Np, __y.__x_); 2401 if (__x.__i_ == 0 || __y.__i_ == 0) 2402 { 2403 size_t __j = _VSTD::min(_Np - __x.__i_, _Np - __y.__i_); 2404 if (!_VSTD::equal(__x.__x_ + __x.__i_, __x.__x_ + __x.__i_ + __j, 2405 __y.__x_ + __y.__i_)) 2406 return false; 2407 if (__x.__i_ == 0) 2408 return _VSTD::equal(__x.__x_ + __j, __x.__x_ + _Np, __y.__x_); 2409 return _VSTD::equal(__x.__x_, __x.__x_ + (_Np - __j), __y.__x_ + __j); 2410 } 2411 if (__x.__i_ < __y.__i_) 2412 { 2413 size_t __j = _Np - __y.__i_; 2414 if (!_VSTD::equal(__x.__x_ + __x.__i_, __x.__x_ + (__x.__i_ + __j), 2415 __y.__x_ + __y.__i_)) 2416 return false; 2417 if (!_VSTD::equal(__x.__x_ + (__x.__i_ + __j), __x.__x_ + _Np, 2418 __y.__x_)) 2419 return false; 2420 return _VSTD::equal(__x.__x_, __x.__x_ + __x.__i_, 2421 __y.__x_ + (_Np - (__x.__i_ + __j))); 2422 } 2423 size_t __j = _Np - __x.__i_; 2424 if (!_VSTD::equal(__y.__x_ + __y.__i_, __y.__x_ + (__y.__i_ + __j), 2425 __x.__x_ + __x.__i_)) 2426 return false; 2427 if (!_VSTD::equal(__y.__x_ + (__y.__i_ + __j), __y.__x_ + _Np, 2428 __x.__x_)) 2429 return false; 2430 return _VSTD::equal(__y.__x_, __y.__x_ + __y.__i_, 2431 __x.__x_ + (_Np - (__y.__i_ + __j))); 2432} 2433 2434template <class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2435 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2436 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2437inline _LIBCPP_INLINE_VISIBILITY 2438bool 2439operator!=(const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2440 _Bp, _Tp, _Cp, _Lp, _Fp>& __x, 2441 const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2442 _Bp, _Tp, _Cp, _Lp, _Fp>& __y) 2443{ 2444 return !(__x == __y); 2445} 2446 2447template <class _CharT, class _Traits, 2448 class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2449 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2450 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2451basic_ostream<_CharT, _Traits>& 2452operator<<(basic_ostream<_CharT, _Traits>& __os, 2453 const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2454 _Bp, _Tp, _Cp, _Lp, _Fp>& __x) 2455{ 2456 __save_flags<_CharT, _Traits> __lx(__os); 2457 __os.flags(ios_base::dec | ios_base::left); 2458 _CharT __sp = __os.widen(' '); 2459 __os.fill(__sp); 2460 __os << __x.__x_[__x.__i_]; 2461 for (size_t __j = __x.__i_ + 1; __j < _Np; ++__j) 2462 __os << __sp << __x.__x_[__j]; 2463 for (size_t __j = 0; __j < __x.__i_; ++__j) 2464 __os << __sp << __x.__x_[__j]; 2465 return __os; 2466} 2467 2468template <class _CharT, class _Traits, 2469 class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2470 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2471 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2472basic_istream<_CharT, _Traits>& 2473operator>>(basic_istream<_CharT, _Traits>& __is, 2474 mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2475 _Bp, _Tp, _Cp, _Lp, _Fp>& __x) 2476{ 2477 __save_flags<_CharT, _Traits> __lx(__is); 2478 __is.flags(ios_base::dec | ios_base::skipws); 2479 _UInt __t[_Np]; 2480 for (size_t __i = 0; __i < _Np; ++__i) 2481 __is >> __t[__i]; 2482 if (!__is.fail()) 2483 { 2484 for (size_t __i = 0; __i < _Np; ++__i) 2485 __x.__x_[__i] = __t[__i]; 2486 __x.__i_ = 0; 2487 } 2488 return __is; 2489} 2490 2491typedef mersenne_twister_engine<uint_fast32_t, 32, 624, 397, 31, 2492 0x9908b0df, 11, 0xffffffff, 2493 7, 0x9d2c5680, 2494 15, 0xefc60000, 2495 18, 1812433253> mt19937; 2496typedef mersenne_twister_engine<uint_fast64_t, 64, 312, 156, 31, 2497 0xb5026f5aa96619e9ULL, 29, 0x5555555555555555ULL, 2498 17, 0x71d67fffeda60000ULL, 2499 37, 0xfff7eee000000000ULL, 2500 43, 6364136223846793005ULL> mt19937_64; 2501 2502// subtract_with_carry_engine 2503 2504template<class _UIntType, size_t __w, size_t __s, size_t __r> 2505class _LIBCPP_TEMPLATE_VIS subtract_with_carry_engine; 2506 2507template<class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2508bool 2509operator==( 2510 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x, 2511 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __y); 2512 2513template<class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2514_LIBCPP_INLINE_VISIBILITY 2515bool 2516operator!=( 2517 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x, 2518 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __y); 2519 2520template <class _CharT, class _Traits, 2521 class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2522basic_ostream<_CharT, _Traits>& 2523operator<<(basic_ostream<_CharT, _Traits>& __os, 2524 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x); 2525 2526template <class _CharT, class _Traits, 2527 class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2528basic_istream<_CharT, _Traits>& 2529operator>>(basic_istream<_CharT, _Traits>& __is, 2530 subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x); 2531 2532template<class _UIntType, size_t __w, size_t __s, size_t __r> 2533class _LIBCPP_TEMPLATE_VIS subtract_with_carry_engine 2534{ 2535public: 2536 // types 2537 typedef _UIntType result_type; 2538 2539private: 2540 result_type __x_[__r]; 2541 result_type __c_; 2542 size_t __i_; 2543 2544 static _LIBCPP_CONSTEXPR const result_type _Dt = numeric_limits<result_type>::digits; 2545 static_assert( 0 < __w, "subtract_with_carry_engine invalid parameters"); 2546 static_assert(__w <= _Dt, "subtract_with_carry_engine invalid parameters"); 2547 static_assert( 0 < __s, "subtract_with_carry_engine invalid parameters"); 2548 static_assert(__s < __r, "subtract_with_carry_engine invalid parameters"); 2549public: 2550 static _LIBCPP_CONSTEXPR const result_type _Min = 0; 2551 static _LIBCPP_CONSTEXPR const result_type _Max = __w == _Dt ? result_type(~0) : 2552 (result_type(1) << __w) - result_type(1); 2553 static_assert(_Min < _Max, "subtract_with_carry_engine invalid parameters"); 2554 2555 // engine characteristics 2556 static _LIBCPP_CONSTEXPR const size_t word_size = __w; 2557 static _LIBCPP_CONSTEXPR const size_t short_lag = __s; 2558 static _LIBCPP_CONSTEXPR const size_t long_lag = __r; 2559 _LIBCPP_INLINE_VISIBILITY 2560 static _LIBCPP_CONSTEXPR result_type min() { return _Min; } 2561 _LIBCPP_INLINE_VISIBILITY 2562 static _LIBCPP_CONSTEXPR result_type max() { return _Max; } 2563 static _LIBCPP_CONSTEXPR const result_type default_seed = 19780503u; 2564 2565 // constructors and seeding functions 2566 _LIBCPP_INLINE_VISIBILITY 2567 explicit subtract_with_carry_engine(result_type __sd = default_seed) 2568 {seed(__sd);} 2569 template<class _Sseq> 2570 _LIBCPP_INLINE_VISIBILITY 2571 explicit subtract_with_carry_engine(_Sseq& __q, 2572 typename enable_if<__is_seed_sequence<_Sseq, subtract_with_carry_engine>::value>::type* = 0) 2573 {seed(__q);} 2574 _LIBCPP_INLINE_VISIBILITY 2575 void seed(result_type __sd = default_seed) 2576 {seed(__sd, integral_constant<unsigned, 1 + (__w - 1) / 32>());} 2577 template<class _Sseq> 2578 _LIBCPP_INLINE_VISIBILITY 2579 typename enable_if 2580 < 2581 __is_seed_sequence<_Sseq, subtract_with_carry_engine>::value, 2582 void 2583 >::type 2584 seed(_Sseq& __q) 2585 {__seed(__q, integral_constant<unsigned, 1 + (__w - 1) / 32>());} 2586 2587 // generating functions 2588 result_type operator()(); 2589 _LIBCPP_INLINE_VISIBILITY 2590 void discard(unsigned long long __z) {for (; __z; --__z) operator()();} 2591 2592 template<class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2593 friend 2594 bool 2595 operator==( 2596 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x, 2597 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __y); 2598 2599 template<class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2600 friend 2601 bool 2602 operator!=( 2603 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x, 2604 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __y); 2605 2606 template <class _CharT, class _Traits, 2607 class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2608 friend 2609 basic_ostream<_CharT, _Traits>& 2610 operator<<(basic_ostream<_CharT, _Traits>& __os, 2611 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x); 2612 2613 template <class _CharT, class _Traits, 2614 class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2615 friend 2616 basic_istream<_CharT, _Traits>& 2617 operator>>(basic_istream<_CharT, _Traits>& __is, 2618 subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x); 2619 2620private: 2621 2622 void seed(result_type __sd, integral_constant<unsigned, 1>); 2623 void seed(result_type __sd, integral_constant<unsigned, 2>); 2624 template<class _Sseq> 2625 void __seed(_Sseq& __q, integral_constant<unsigned, 1>); 2626 template<class _Sseq> 2627 void __seed(_Sseq& __q, integral_constant<unsigned, 2>); 2628}; 2629 2630template<class _UIntType, size_t __w, size_t __s, size_t __r> 2631 _LIBCPP_CONSTEXPR const size_t subtract_with_carry_engine<_UIntType, __w, __s, __r>::word_size; 2632 2633template<class _UIntType, size_t __w, size_t __s, size_t __r> 2634 _LIBCPP_CONSTEXPR const size_t subtract_with_carry_engine<_UIntType, __w, __s, __r>::short_lag; 2635 2636template<class _UIntType, size_t __w, size_t __s, size_t __r> 2637 _LIBCPP_CONSTEXPR const size_t subtract_with_carry_engine<_UIntType, __w, __s, __r>::long_lag; 2638 2639template<class _UIntType, size_t __w, size_t __s, size_t __r> 2640 _LIBCPP_CONSTEXPR const typename subtract_with_carry_engine<_UIntType, __w, __s, __r>::result_type 2641 subtract_with_carry_engine<_UIntType, __w, __s, __r>::default_seed; 2642 2643template<class _UIntType, size_t __w, size_t __s, size_t __r> 2644void 2645subtract_with_carry_engine<_UIntType, __w, __s, __r>::seed(result_type __sd, 2646 integral_constant<unsigned, 1>) 2647{ 2648 linear_congruential_engine<result_type, 40014u, 0u, 2147483563u> 2649 __e(__sd == 0u ? default_seed : __sd); 2650 for (size_t __i = 0; __i < __r; ++__i) 2651 __x_[__i] = static_cast<result_type>(__e() & _Max); 2652 __c_ = __x_[__r-1] == 0; 2653 __i_ = 0; 2654} 2655 2656template<class _UIntType, size_t __w, size_t __s, size_t __r> 2657void 2658subtract_with_carry_engine<_UIntType, __w, __s, __r>::seed(result_type __sd, 2659 integral_constant<unsigned, 2>) 2660{ 2661 linear_congruential_engine<result_type, 40014u, 0u, 2147483563u> 2662 __e(__sd == 0u ? default_seed : __sd); 2663 for (size_t __i = 0; __i < __r; ++__i) 2664 { 2665 result_type __e0 = __e(); 2666 __x_[__i] = static_cast<result_type>( 2667 (__e0 + ((uint64_t)__e() << 32)) & _Max); 2668 } 2669 __c_ = __x_[__r-1] == 0; 2670 __i_ = 0; 2671} 2672 2673template<class _UIntType, size_t __w, size_t __s, size_t __r> 2674template<class _Sseq> 2675void 2676subtract_with_carry_engine<_UIntType, __w, __s, __r>::__seed(_Sseq& __q, 2677 integral_constant<unsigned, 1>) 2678{ 2679 const unsigned __k = 1; 2680 uint32_t __ar[__r * __k]; 2681 __q.generate(__ar, __ar + __r * __k); 2682 for (size_t __i = 0; __i < __r; ++__i) 2683 __x_[__i] = static_cast<result_type>(__ar[__i] & _Max); 2684 __c_ = __x_[__r-1] == 0; 2685 __i_ = 0; 2686} 2687 2688template<class _UIntType, size_t __w, size_t __s, size_t __r> 2689template<class _Sseq> 2690void 2691subtract_with_carry_engine<_UIntType, __w, __s, __r>::__seed(_Sseq& __q, 2692 integral_constant<unsigned, 2>) 2693{ 2694 const unsigned __k = 2; 2695 uint32_t __ar[__r * __k]; 2696 __q.generate(__ar, __ar + __r * __k); 2697 for (size_t __i = 0; __i < __r; ++__i) 2698 __x_[__i] = static_cast<result_type>( 2699 (__ar[2 * __i] + ((uint64_t)__ar[2 * __i + 1] << 32)) & _Max); 2700 __c_ = __x_[__r-1] == 0; 2701 __i_ = 0; 2702} 2703 2704template<class _UIntType, size_t __w, size_t __s, size_t __r> 2705_UIntType 2706subtract_with_carry_engine<_UIntType, __w, __s, __r>::operator()() 2707{ 2708 const result_type& __xs = __x_[(__i_ + (__r - __s)) % __r]; 2709 result_type& __xr = __x_[__i_]; 2710 result_type __new_c = __c_ == 0 ? __xs < __xr : __xs != 0 ? __xs <= __xr : 1; 2711 __xr = (__xs - __xr - __c_) & _Max; 2712 __c_ = __new_c; 2713 __i_ = (__i_ + 1) % __r; 2714 return __xr; 2715} 2716 2717template<class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2718bool 2719operator==( 2720 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x, 2721 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __y) 2722{ 2723 if (__x.__c_ != __y.__c_) 2724 return false; 2725 if (__x.__i_ == __y.__i_) 2726 return _VSTD::equal(__x.__x_, __x.__x_ + _Rp, __y.__x_); 2727 if (__x.__i_ == 0 || __y.__i_ == 0) 2728 { 2729 size_t __j = _VSTD::min(_Rp - __x.__i_, _Rp - __y.__i_); 2730 if (!_VSTD::equal(__x.__x_ + __x.__i_, __x.__x_ + __x.__i_ + __j, 2731 __y.__x_ + __y.__i_)) 2732 return false; 2733 if (__x.__i_ == 0) 2734 return _VSTD::equal(__x.__x_ + __j, __x.__x_ + _Rp, __y.__x_); 2735 return _VSTD::equal(__x.__x_, __x.__x_ + (_Rp - __j), __y.__x_ + __j); 2736 } 2737 if (__x.__i_ < __y.__i_) 2738 { 2739 size_t __j = _Rp - __y.__i_; 2740 if (!_VSTD::equal(__x.__x_ + __x.__i_, __x.__x_ + (__x.__i_ + __j), 2741 __y.__x_ + __y.__i_)) 2742 return false; 2743 if (!_VSTD::equal(__x.__x_ + (__x.__i_ + __j), __x.__x_ + _Rp, 2744 __y.__x_)) 2745 return false; 2746 return _VSTD::equal(__x.__x_, __x.__x_ + __x.__i_, 2747 __y.__x_ + (_Rp - (__x.__i_ + __j))); 2748 } 2749 size_t __j = _Rp - __x.__i_; 2750 if (!_VSTD::equal(__y.__x_ + __y.__i_, __y.__x_ + (__y.__i_ + __j), 2751 __x.__x_ + __x.__i_)) 2752 return false; 2753 if (!_VSTD::equal(__y.__x_ + (__y.__i_ + __j), __y.__x_ + _Rp, 2754 __x.__x_)) 2755 return false; 2756 return _VSTD::equal(__y.__x_, __y.__x_ + __y.__i_, 2757 __x.__x_ + (_Rp - (__y.__i_ + __j))); 2758} 2759 2760template<class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2761inline _LIBCPP_INLINE_VISIBILITY 2762bool 2763operator!=( 2764 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x, 2765 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __y) 2766{ 2767 return !(__x == __y); 2768} 2769 2770template <class _CharT, class _Traits, 2771 class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2772basic_ostream<_CharT, _Traits>& 2773operator<<(basic_ostream<_CharT, _Traits>& __os, 2774 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x) 2775{ 2776 __save_flags<_CharT, _Traits> __lx(__os); 2777 __os.flags(ios_base::dec | ios_base::left); 2778 _CharT __sp = __os.widen(' '); 2779 __os.fill(__sp); 2780 __os << __x.__x_[__x.__i_]; 2781 for (size_t __j = __x.__i_ + 1; __j < _Rp; ++__j) 2782 __os << __sp << __x.__x_[__j]; 2783 for (size_t __j = 0; __j < __x.__i_; ++__j) 2784 __os << __sp << __x.__x_[__j]; 2785 __os << __sp << __x.__c_; 2786 return __os; 2787} 2788 2789template <class _CharT, class _Traits, 2790 class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2791basic_istream<_CharT, _Traits>& 2792operator>>(basic_istream<_CharT, _Traits>& __is, 2793 subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x) 2794{ 2795 __save_flags<_CharT, _Traits> __lx(__is); 2796 __is.flags(ios_base::dec | ios_base::skipws); 2797 _UInt __t[_Rp+1]; 2798 for (size_t __i = 0; __i < _Rp+1; ++__i) 2799 __is >> __t[__i]; 2800 if (!__is.fail()) 2801 { 2802 for (size_t __i = 0; __i < _Rp; ++__i) 2803 __x.__x_[__i] = __t[__i]; 2804 __x.__c_ = __t[_Rp]; 2805 __x.__i_ = 0; 2806 } 2807 return __is; 2808} 2809 2810typedef subtract_with_carry_engine<uint_fast32_t, 24, 10, 24> ranlux24_base; 2811typedef subtract_with_carry_engine<uint_fast64_t, 48, 5, 12> ranlux48_base; 2812 2813// discard_block_engine 2814 2815template<class _Engine, size_t __p, size_t __r> 2816class _LIBCPP_TEMPLATE_VIS discard_block_engine 2817{ 2818 _Engine __e_; 2819 int __n_; 2820 2821 static_assert( 0 < __r, "discard_block_engine invalid parameters"); 2822 static_assert(__r <= __p, "discard_block_engine invalid parameters"); 2823 static_assert(__r <= INT_MAX, "discard_block_engine invalid parameters"); 2824public: 2825 // types 2826 typedef typename _Engine::result_type result_type; 2827 2828 // engine characteristics 2829 static _LIBCPP_CONSTEXPR const size_t block_size = __p; 2830 static _LIBCPP_CONSTEXPR const size_t used_block = __r; 2831 2832#ifdef _LIBCPP_CXX03_LANG 2833 static const result_type _Min = _Engine::_Min; 2834 static const result_type _Max = _Engine::_Max; 2835#else 2836 static _LIBCPP_CONSTEXPR const result_type _Min = _Engine::min(); 2837 static _LIBCPP_CONSTEXPR const result_type _Max = _Engine::max(); 2838#endif 2839 2840 _LIBCPP_INLINE_VISIBILITY 2841 static _LIBCPP_CONSTEXPR result_type min() { return _Engine::min(); } 2842 _LIBCPP_INLINE_VISIBILITY 2843 static _LIBCPP_CONSTEXPR result_type max() { return _Engine::max(); } 2844 2845 // constructors and seeding functions 2846 _LIBCPP_INLINE_VISIBILITY 2847 discard_block_engine() : __n_(0) {} 2848 _LIBCPP_INLINE_VISIBILITY 2849 explicit discard_block_engine(const _Engine& __e) 2850 : __e_(__e), __n_(0) {} 2851#ifndef _LIBCPP_CXX03_LANG 2852 _LIBCPP_INLINE_VISIBILITY 2853 explicit discard_block_engine(_Engine&& __e) 2854 : __e_(_VSTD::move(__e)), __n_(0) {} 2855#endif // _LIBCPP_CXX03_LANG 2856 _LIBCPP_INLINE_VISIBILITY 2857 explicit discard_block_engine(result_type __sd) : __e_(__sd), __n_(0) {} 2858 template<class _Sseq> 2859 _LIBCPP_INLINE_VISIBILITY 2860 explicit discard_block_engine(_Sseq& __q, 2861 typename enable_if<__is_seed_sequence<_Sseq, discard_block_engine>::value && 2862 !is_convertible<_Sseq, _Engine>::value>::type* = 0) 2863 : __e_(__q), __n_(0) {} 2864 _LIBCPP_INLINE_VISIBILITY 2865 void seed() {__e_.seed(); __n_ = 0;} 2866 _LIBCPP_INLINE_VISIBILITY 2867 void seed(result_type __sd) {__e_.seed(__sd); __n_ = 0;} 2868 template<class _Sseq> 2869 _LIBCPP_INLINE_VISIBILITY 2870 typename enable_if 2871 < 2872 __is_seed_sequence<_Sseq, discard_block_engine>::value, 2873 void 2874 >::type 2875 seed(_Sseq& __q) {__e_.seed(__q); __n_ = 0;} 2876 2877 // generating functions 2878 result_type operator()(); 2879 _LIBCPP_INLINE_VISIBILITY 2880 void discard(unsigned long long __z) {for (; __z; --__z) operator()();} 2881 2882 // property functions 2883 _LIBCPP_INLINE_VISIBILITY 2884 const _Engine& base() const _NOEXCEPT {return __e_;} 2885 2886 template<class _Eng, size_t _Pp, size_t _Rp> 2887 friend 2888 bool 2889 operator==( 2890 const discard_block_engine<_Eng, _Pp, _Rp>& __x, 2891 const discard_block_engine<_Eng, _Pp, _Rp>& __y); 2892 2893 template<class _Eng, size_t _Pp, size_t _Rp> 2894 friend 2895 bool 2896 operator!=( 2897 const discard_block_engine<_Eng, _Pp, _Rp>& __x, 2898 const discard_block_engine<_Eng, _Pp, _Rp>& __y); 2899 2900 template <class _CharT, class _Traits, 2901 class _Eng, size_t _Pp, size_t _Rp> 2902 friend 2903 basic_ostream<_CharT, _Traits>& 2904 operator<<(basic_ostream<_CharT, _Traits>& __os, 2905 const discard_block_engine<_Eng, _Pp, _Rp>& __x); 2906 2907 template <class _CharT, class _Traits, 2908 class _Eng, size_t _Pp, size_t _Rp> 2909 friend 2910 basic_istream<_CharT, _Traits>& 2911 operator>>(basic_istream<_CharT, _Traits>& __is, 2912 discard_block_engine<_Eng, _Pp, _Rp>& __x); 2913}; 2914 2915template<class _Engine, size_t __p, size_t __r> 2916 _LIBCPP_CONSTEXPR const size_t discard_block_engine<_Engine, __p, __r>::block_size; 2917 2918template<class _Engine, size_t __p, size_t __r> 2919 _LIBCPP_CONSTEXPR const size_t discard_block_engine<_Engine, __p, __r>::used_block; 2920 2921template<class _Engine, size_t __p, size_t __r> 2922typename discard_block_engine<_Engine, __p, __r>::result_type 2923discard_block_engine<_Engine, __p, __r>::operator()() 2924{ 2925 if (__n_ >= static_cast<int>(__r)) 2926 { 2927 __e_.discard(__p - __r); 2928 __n_ = 0; 2929 } 2930 ++__n_; 2931 return __e_(); 2932} 2933 2934template<class _Eng, size_t _Pp, size_t _Rp> 2935inline _LIBCPP_INLINE_VISIBILITY 2936bool 2937operator==(const discard_block_engine<_Eng, _Pp, _Rp>& __x, 2938 const discard_block_engine<_Eng, _Pp, _Rp>& __y) 2939{ 2940 return __x.__n_ == __y.__n_ && __x.__e_ == __y.__e_; 2941} 2942 2943template<class _Eng, size_t _Pp, size_t _Rp> 2944inline _LIBCPP_INLINE_VISIBILITY 2945bool 2946operator!=(const discard_block_engine<_Eng, _Pp, _Rp>& __x, 2947 const discard_block_engine<_Eng, _Pp, _Rp>& __y) 2948{ 2949 return !(__x == __y); 2950} 2951 2952template <class _CharT, class _Traits, 2953 class _Eng, size_t _Pp, size_t _Rp> 2954basic_ostream<_CharT, _Traits>& 2955operator<<(basic_ostream<_CharT, _Traits>& __os, 2956 const discard_block_engine<_Eng, _Pp, _Rp>& __x) 2957{ 2958 __save_flags<_CharT, _Traits> __lx(__os); 2959 __os.flags(ios_base::dec | ios_base::left); 2960 _CharT __sp = __os.widen(' '); 2961 __os.fill(__sp); 2962 return __os << __x.__e_ << __sp << __x.__n_; 2963} 2964 2965template <class _CharT, class _Traits, 2966 class _Eng, size_t _Pp, size_t _Rp> 2967basic_istream<_CharT, _Traits>& 2968operator>>(basic_istream<_CharT, _Traits>& __is, 2969 discard_block_engine<_Eng, _Pp, _Rp>& __x) 2970{ 2971 __save_flags<_CharT, _Traits> __lx(__is); 2972 __is.flags(ios_base::dec | ios_base::skipws); 2973 _Eng __e; 2974 int __n; 2975 __is >> __e >> __n; 2976 if (!__is.fail()) 2977 { 2978 __x.__e_ = __e; 2979 __x.__n_ = __n; 2980 } 2981 return __is; 2982} 2983 2984typedef discard_block_engine<ranlux24_base, 223, 23> ranlux24; 2985typedef discard_block_engine<ranlux48_base, 389, 11> ranlux48; 2986 2987// independent_bits_engine 2988 2989template<class _Engine, size_t __w, class _UIntType> 2990class _LIBCPP_TEMPLATE_VIS independent_bits_engine 2991{ 2992 template <class _UInt, _UInt _R0, size_t _Wp, size_t _Mp> 2993 class __get_n 2994 { 2995 static _LIBCPP_CONSTEXPR const size_t _Dt = numeric_limits<_UInt>::digits; 2996 static _LIBCPP_CONSTEXPR const size_t _Np = _Wp / _Mp + (_Wp % _Mp != 0); 2997 static _LIBCPP_CONSTEXPR const size_t _W0 = _Wp / _Np; 2998 static _LIBCPP_CONSTEXPR const _UInt _Y0 = _W0 >= _Dt ? 0 : (_R0 >> _W0) << _W0; 2999 public: 3000 static _LIBCPP_CONSTEXPR const size_t value = _R0 - _Y0 > _Y0 / _Np ? _Np + 1 : _Np; 3001 }; 3002public: 3003 // types 3004 typedef _UIntType result_type; 3005 3006private: 3007 _Engine __e_; 3008 3009 static _LIBCPP_CONSTEXPR const result_type _Dt = numeric_limits<result_type>::digits; 3010 static_assert( 0 < __w, "independent_bits_engine invalid parameters"); 3011 static_assert(__w <= _Dt, "independent_bits_engine invalid parameters"); 3012 3013 typedef typename _Engine::result_type _Engine_result_type; 3014 typedef typename conditional 3015 < 3016 sizeof(_Engine_result_type) <= sizeof(result_type), 3017 result_type, 3018 _Engine_result_type 3019 >::type _Working_result_type; 3020#ifdef _LIBCPP_CXX03_LANG 3021 static const _Working_result_type _Rp = _Engine::_Max - _Engine::_Min 3022 + _Working_result_type(1); 3023#else 3024 static _LIBCPP_CONSTEXPR const _Working_result_type _Rp = _Engine::max() - _Engine::min() 3025 + _Working_result_type(1); 3026#endif 3027 static _LIBCPP_CONSTEXPR const size_t __m = __log2<_Working_result_type, _Rp>::value; 3028 static _LIBCPP_CONSTEXPR const size_t __n = __get_n<_Working_result_type, _Rp, __w, __m>::value; 3029 static _LIBCPP_CONSTEXPR const size_t __w0 = __w / __n; 3030 static _LIBCPP_CONSTEXPR const size_t __n0 = __n - __w % __n; 3031 static _LIBCPP_CONSTEXPR const size_t _WDt = numeric_limits<_Working_result_type>::digits; 3032 static _LIBCPP_CONSTEXPR const size_t _EDt = numeric_limits<_Engine_result_type>::digits; 3033 static _LIBCPP_CONSTEXPR const _Working_result_type __y0 = __w0 >= _WDt ? 0 : 3034 (_Rp >> __w0) << __w0; 3035 static _LIBCPP_CONSTEXPR const _Working_result_type __y1 = __w0 >= _WDt - 1 ? 0 : 3036 (_Rp >> (__w0+1)) << (__w0+1); 3037 static _LIBCPP_CONSTEXPR const _Engine_result_type __mask0 = __w0 > 0 ? 3038 _Engine_result_type(~0) >> (_EDt - __w0) : 3039 _Engine_result_type(0); 3040 static _LIBCPP_CONSTEXPR const _Engine_result_type __mask1 = __w0 < _EDt - 1 ? 3041 _Engine_result_type(~0) >> (_EDt - (__w0 + 1)) : 3042 _Engine_result_type(~0); 3043public: 3044 static _LIBCPP_CONSTEXPR const result_type _Min = 0; 3045 static _LIBCPP_CONSTEXPR const result_type _Max = __w == _Dt ? result_type(~0) : 3046 (result_type(1) << __w) - result_type(1); 3047 static_assert(_Min < _Max, "independent_bits_engine invalid parameters"); 3048 3049 // engine characteristics 3050 _LIBCPP_INLINE_VISIBILITY 3051 static _LIBCPP_CONSTEXPR result_type min() { return _Min; } 3052 _LIBCPP_INLINE_VISIBILITY 3053 static _LIBCPP_CONSTEXPR result_type max() { return _Max; } 3054 3055 // constructors and seeding functions 3056 _LIBCPP_INLINE_VISIBILITY 3057 independent_bits_engine() {} 3058 _LIBCPP_INLINE_VISIBILITY 3059 explicit independent_bits_engine(const _Engine& __e) 3060 : __e_(__e) {} 3061#ifndef _LIBCPP_CXX03_LANG 3062 _LIBCPP_INLINE_VISIBILITY 3063 explicit independent_bits_engine(_Engine&& __e) 3064 : __e_(_VSTD::move(__e)) {} 3065#endif // _LIBCPP_CXX03_LANG 3066 _LIBCPP_INLINE_VISIBILITY 3067 explicit independent_bits_engine(result_type __sd) : __e_(__sd) {} 3068 template<class _Sseq> 3069 _LIBCPP_INLINE_VISIBILITY 3070 explicit independent_bits_engine(_Sseq& __q, 3071 typename enable_if<__is_seed_sequence<_Sseq, independent_bits_engine>::value && 3072 !is_convertible<_Sseq, _Engine>::value>::type* = 0) 3073 : __e_(__q) {} 3074 _LIBCPP_INLINE_VISIBILITY 3075 void seed() {__e_.seed();} 3076 _LIBCPP_INLINE_VISIBILITY 3077 void seed(result_type __sd) {__e_.seed(__sd);} 3078 template<class _Sseq> 3079 _LIBCPP_INLINE_VISIBILITY 3080 typename enable_if 3081 < 3082 __is_seed_sequence<_Sseq, independent_bits_engine>::value, 3083 void 3084 >::type 3085 seed(_Sseq& __q) {__e_.seed(__q);} 3086 3087 // generating functions 3088 _LIBCPP_INLINE_VISIBILITY 3089 result_type operator()() {return __eval(integral_constant<bool, _Rp != 0>());} 3090 _LIBCPP_INLINE_VISIBILITY 3091 void discard(unsigned long long __z) {for (; __z; --__z) operator()();} 3092 3093 // property functions 3094 _LIBCPP_INLINE_VISIBILITY 3095 const _Engine& base() const _NOEXCEPT {return __e_;} 3096 3097 template<class _Eng, size_t _Wp, class _UInt> 3098 friend 3099 bool 3100 operator==( 3101 const independent_bits_engine<_Eng, _Wp, _UInt>& __x, 3102 const independent_bits_engine<_Eng, _Wp, _UInt>& __y); 3103 3104 template<class _Eng, size_t _Wp, class _UInt> 3105 friend 3106 bool 3107 operator!=( 3108 const independent_bits_engine<_Eng, _Wp, _UInt>& __x, 3109 const independent_bits_engine<_Eng, _Wp, _UInt>& __y); 3110 3111 template <class _CharT, class _Traits, 3112 class _Eng, size_t _Wp, class _UInt> 3113 friend 3114 basic_ostream<_CharT, _Traits>& 3115 operator<<(basic_ostream<_CharT, _Traits>& __os, 3116 const independent_bits_engine<_Eng, _Wp, _UInt>& __x); 3117 3118 template <class _CharT, class _Traits, 3119 class _Eng, size_t _Wp, class _UInt> 3120 friend 3121 basic_istream<_CharT, _Traits>& 3122 operator>>(basic_istream<_CharT, _Traits>& __is, 3123 independent_bits_engine<_Eng, _Wp, _UInt>& __x); 3124 3125private: 3126 _LIBCPP_INLINE_VISIBILITY 3127 result_type __eval(false_type); 3128 result_type __eval(true_type); 3129 3130 template <size_t __count> 3131 _LIBCPP_INLINE_VISIBILITY 3132 static 3133 typename enable_if 3134 < 3135 __count < _Dt, 3136 result_type 3137 >::type 3138 __lshift(result_type __x) {return __x << __count;} 3139 3140 template <size_t __count> 3141 _LIBCPP_INLINE_VISIBILITY 3142 static 3143 typename enable_if 3144 < 3145 (__count >= _Dt), 3146 result_type 3147 >::type 3148 __lshift(result_type) {return result_type(0);} 3149}; 3150 3151template<class _Engine, size_t __w, class _UIntType> 3152inline 3153_UIntType 3154independent_bits_engine<_Engine, __w, _UIntType>::__eval(false_type) 3155{ 3156 return static_cast<result_type>(__e_() & __mask0); 3157} 3158 3159template<class _Engine, size_t __w, class _UIntType> 3160_UIntType 3161independent_bits_engine<_Engine, __w, _UIntType>::__eval(true_type) 3162{ 3163 result_type _Sp = 0; 3164 for (size_t __k = 0; __k < __n0; ++__k) 3165 { 3166 _Engine_result_type __u; 3167 do 3168 { 3169 __u = __e_() - _Engine::min(); 3170 } while (__u >= __y0); 3171 _Sp = static_cast<result_type>(__lshift<__w0>(_Sp) + (__u & __mask0)); 3172 } 3173 for (size_t __k = __n0; __k < __n; ++__k) 3174 { 3175 _Engine_result_type __u; 3176 do 3177 { 3178 __u = __e_() - _Engine::min(); 3179 } while (__u >= __y1); 3180 _Sp = static_cast<result_type>(__lshift<__w0+1>(_Sp) + (__u & __mask1)); 3181 } 3182 return _Sp; 3183} 3184 3185template<class _Eng, size_t _Wp, class _UInt> 3186inline _LIBCPP_INLINE_VISIBILITY 3187bool 3188operator==( 3189 const independent_bits_engine<_Eng, _Wp, _UInt>& __x, 3190 const independent_bits_engine<_Eng, _Wp, _UInt>& __y) 3191{ 3192 return __x.base() == __y.base(); 3193} 3194 3195template<class _Eng, size_t _Wp, class _UInt> 3196inline _LIBCPP_INLINE_VISIBILITY 3197bool 3198operator!=( 3199 const independent_bits_engine<_Eng, _Wp, _UInt>& __x, 3200 const independent_bits_engine<_Eng, _Wp, _UInt>& __y) 3201{ 3202 return !(__x == __y); 3203} 3204 3205template <class _CharT, class _Traits, 3206 class _Eng, size_t _Wp, class _UInt> 3207basic_ostream<_CharT, _Traits>& 3208operator<<(basic_ostream<_CharT, _Traits>& __os, 3209 const independent_bits_engine<_Eng, _Wp, _UInt>& __x) 3210{ 3211 return __os << __x.base(); 3212} 3213 3214template <class _CharT, class _Traits, 3215 class _Eng, size_t _Wp, class _UInt> 3216basic_istream<_CharT, _Traits>& 3217operator>>(basic_istream<_CharT, _Traits>& __is, 3218 independent_bits_engine<_Eng, _Wp, _UInt>& __x) 3219{ 3220 _Eng __e; 3221 __is >> __e; 3222 if (!__is.fail()) 3223 __x.__e_ = __e; 3224 return __is; 3225} 3226 3227// shuffle_order_engine 3228 3229template <uint64_t _Xp, uint64_t _Yp> 3230struct __ugcd 3231{ 3232 static _LIBCPP_CONSTEXPR const uint64_t value = __ugcd<_Yp, _Xp % _Yp>::value; 3233}; 3234 3235template <uint64_t _Xp> 3236struct __ugcd<_Xp, 0> 3237{ 3238 static _LIBCPP_CONSTEXPR const uint64_t value = _Xp; 3239}; 3240 3241template <uint64_t _Np, uint64_t _Dp> 3242class __uratio 3243{ 3244 static_assert(_Dp != 0, "__uratio divide by 0"); 3245 static _LIBCPP_CONSTEXPR const uint64_t __gcd = __ugcd<_Np, _Dp>::value; 3246public: 3247 static _LIBCPP_CONSTEXPR const uint64_t num = _Np / __gcd; 3248 static _LIBCPP_CONSTEXPR const uint64_t den = _Dp / __gcd; 3249 3250 typedef __uratio<num, den> type; 3251}; 3252 3253template<class _Engine, size_t __k> 3254class _LIBCPP_TEMPLATE_VIS shuffle_order_engine 3255{ 3256 static_assert(0 < __k, "shuffle_order_engine invalid parameters"); 3257public: 3258 // types 3259 typedef typename _Engine::result_type result_type; 3260 3261private: 3262 _Engine __e_; 3263 result_type _V_[__k]; 3264 result_type _Y_; 3265 3266public: 3267 // engine characteristics 3268 static _LIBCPP_CONSTEXPR const size_t table_size = __k; 3269 3270#ifdef _LIBCPP_CXX03_LANG 3271 static const result_type _Min = _Engine::_Min; 3272 static const result_type _Max = _Engine::_Max; 3273#else 3274 static _LIBCPP_CONSTEXPR const result_type _Min = _Engine::min(); 3275 static _LIBCPP_CONSTEXPR const result_type _Max = _Engine::max(); 3276#endif 3277 static_assert(_Min < _Max, "shuffle_order_engine invalid parameters"); 3278 _LIBCPP_INLINE_VISIBILITY 3279 static _LIBCPP_CONSTEXPR result_type min() { return _Min; } 3280 _LIBCPP_INLINE_VISIBILITY 3281 static _LIBCPP_CONSTEXPR result_type max() { return _Max; } 3282 3283 static _LIBCPP_CONSTEXPR const unsigned long long _Rp = _Max - _Min + 1ull; 3284 3285 // constructors and seeding functions 3286 _LIBCPP_INLINE_VISIBILITY 3287 shuffle_order_engine() {__init();} 3288 _LIBCPP_INLINE_VISIBILITY 3289 explicit shuffle_order_engine(const _Engine& __e) 3290 : __e_(__e) {__init();} 3291#ifndef _LIBCPP_CXX03_LANG 3292 _LIBCPP_INLINE_VISIBILITY 3293 explicit shuffle_order_engine(_Engine&& __e) 3294 : __e_(_VSTD::move(__e)) {__init();} 3295#endif // _LIBCPP_CXX03_LANG 3296 _LIBCPP_INLINE_VISIBILITY 3297 explicit shuffle_order_engine(result_type __sd) : __e_(__sd) {__init();} 3298 template<class _Sseq> 3299 _LIBCPP_INLINE_VISIBILITY 3300 explicit shuffle_order_engine(_Sseq& __q, 3301 typename enable_if<__is_seed_sequence<_Sseq, shuffle_order_engine>::value && 3302 !is_convertible<_Sseq, _Engine>::value>::type* = 0) 3303 : __e_(__q) {__init();} 3304 _LIBCPP_INLINE_VISIBILITY 3305 void seed() {__e_.seed(); __init();} 3306 _LIBCPP_INLINE_VISIBILITY 3307 void seed(result_type __sd) {__e_.seed(__sd); __init();} 3308 template<class _Sseq> 3309 _LIBCPP_INLINE_VISIBILITY 3310 typename enable_if 3311 < 3312 __is_seed_sequence<_Sseq, shuffle_order_engine>::value, 3313 void 3314 >::type 3315 seed(_Sseq& __q) {__e_.seed(__q); __init();} 3316 3317 // generating functions 3318 _LIBCPP_INLINE_VISIBILITY 3319 result_type operator()() {return __eval(integral_constant<bool, _Rp != 0>());} 3320 _LIBCPP_INLINE_VISIBILITY 3321 void discard(unsigned long long __z) {for (; __z; --__z) operator()();} 3322 3323 // property functions 3324 _LIBCPP_INLINE_VISIBILITY 3325 const _Engine& base() const _NOEXCEPT {return __e_;} 3326 3327private: 3328 template<class _Eng, size_t _Kp> 3329 friend 3330 bool 3331 operator==( 3332 const shuffle_order_engine<_Eng, _Kp>& __x, 3333 const shuffle_order_engine<_Eng, _Kp>& __y); 3334 3335 template<class _Eng, size_t _Kp> 3336 friend 3337 bool 3338 operator!=( 3339 const shuffle_order_engine<_Eng, _Kp>& __x, 3340 const shuffle_order_engine<_Eng, _Kp>& __y); 3341 3342 template <class _CharT, class _Traits, 3343 class _Eng, size_t _Kp> 3344 friend 3345 basic_ostream<_CharT, _Traits>& 3346 operator<<(basic_ostream<_CharT, _Traits>& __os, 3347 const shuffle_order_engine<_Eng, _Kp>& __x); 3348 3349 template <class _CharT, class _Traits, 3350 class _Eng, size_t _Kp> 3351 friend 3352 basic_istream<_CharT, _Traits>& 3353 operator>>(basic_istream<_CharT, _Traits>& __is, 3354 shuffle_order_engine<_Eng, _Kp>& __x); 3355 3356 _LIBCPP_INLINE_VISIBILITY 3357 void __init() 3358 { 3359 for (size_t __i = 0; __i < __k; ++__i) 3360 _V_[__i] = __e_(); 3361 _Y_ = __e_(); 3362 } 3363 3364 _LIBCPP_INLINE_VISIBILITY 3365 result_type __eval(false_type) {return __eval2(integral_constant<bool, __k & 1>());} 3366 _LIBCPP_INLINE_VISIBILITY 3367 result_type __eval(true_type) {return __eval(__uratio<__k, _Rp>());} 3368 3369 _LIBCPP_INLINE_VISIBILITY 3370 result_type __eval2(false_type) {return __eval(__uratio<__k/2, 0x8000000000000000ull>());} 3371 _LIBCPP_INLINE_VISIBILITY 3372 result_type __eval2(true_type) {return __evalf<__k, 0>();} 3373 3374 template <uint64_t _Np, uint64_t _Dp> 3375 _LIBCPP_INLINE_VISIBILITY 3376 typename enable_if 3377 < 3378 (__uratio<_Np, _Dp>::num > 0xFFFFFFFFFFFFFFFFull / (_Max - _Min)), 3379 result_type 3380 >::type 3381 __eval(__uratio<_Np, _Dp>) 3382 {return __evalf<__uratio<_Np, _Dp>::num, __uratio<_Np, _Dp>::den>();} 3383 3384 template <uint64_t _Np, uint64_t _Dp> 3385 _LIBCPP_INLINE_VISIBILITY 3386 typename enable_if 3387 < 3388 __uratio<_Np, _Dp>::num <= 0xFFFFFFFFFFFFFFFFull / (_Max - _Min), 3389 result_type 3390 >::type 3391 __eval(__uratio<_Np, _Dp>) 3392 { 3393 const size_t __j = static_cast<size_t>(__uratio<_Np, _Dp>::num * (_Y_ - _Min) 3394 / __uratio<_Np, _Dp>::den); 3395 _Y_ = _V_[__j]; 3396 _V_[__j] = __e_(); 3397 return _Y_; 3398 } 3399 3400 template <uint64_t __n, uint64_t __d> 3401 _LIBCPP_INLINE_VISIBILITY 3402 result_type __evalf() 3403 { 3404 const double _Fp = __d == 0 ? 3405 __n / (2. * 0x8000000000000000ull) : 3406 __n / (double)__d; 3407 const size_t __j = static_cast<size_t>(_Fp * (_Y_ - _Min)); 3408 _Y_ = _V_[__j]; 3409 _V_[__j] = __e_(); 3410 return _Y_; 3411 } 3412}; 3413 3414template<class _Engine, size_t __k> 3415 _LIBCPP_CONSTEXPR const size_t shuffle_order_engine<_Engine, __k>::table_size; 3416 3417template<class _Eng, size_t _Kp> 3418bool 3419operator==( 3420 const shuffle_order_engine<_Eng, _Kp>& __x, 3421 const shuffle_order_engine<_Eng, _Kp>& __y) 3422{ 3423 return __x._Y_ == __y._Y_ && _VSTD::equal(__x._V_, __x._V_ + _Kp, __y._V_) && 3424 __x.__e_ == __y.__e_; 3425} 3426 3427template<class _Eng, size_t _Kp> 3428inline _LIBCPP_INLINE_VISIBILITY 3429bool 3430operator!=( 3431 const shuffle_order_engine<_Eng, _Kp>& __x, 3432 const shuffle_order_engine<_Eng, _Kp>& __y) 3433{ 3434 return !(__x == __y); 3435} 3436 3437template <class _CharT, class _Traits, 3438 class _Eng, size_t _Kp> 3439basic_ostream<_CharT, _Traits>& 3440operator<<(basic_ostream<_CharT, _Traits>& __os, 3441 const shuffle_order_engine<_Eng, _Kp>& __x) 3442{ 3443 __save_flags<_CharT, _Traits> __lx(__os); 3444 __os.flags(ios_base::dec | ios_base::left); 3445 _CharT __sp = __os.widen(' '); 3446 __os.fill(__sp); 3447 __os << __x.__e_ << __sp << __x._V_[0]; 3448 for (size_t __i = 1; __i < _Kp; ++__i) 3449 __os << __sp << __x._V_[__i]; 3450 return __os << __sp << __x._Y_; 3451} 3452 3453template <class _CharT, class _Traits, 3454 class _Eng, size_t _Kp> 3455basic_istream<_CharT, _Traits>& 3456operator>>(basic_istream<_CharT, _Traits>& __is, 3457 shuffle_order_engine<_Eng, _Kp>& __x) 3458{ 3459 typedef typename shuffle_order_engine<_Eng, _Kp>::result_type result_type; 3460 __save_flags<_CharT, _Traits> __lx(__is); 3461 __is.flags(ios_base::dec | ios_base::skipws); 3462 _Eng __e; 3463 result_type _Vp[_Kp+1]; 3464 __is >> __e; 3465 for (size_t __i = 0; __i < _Kp+1; ++__i) 3466 __is >> _Vp[__i]; 3467 if (!__is.fail()) 3468 { 3469 __x.__e_ = __e; 3470 for (size_t __i = 0; __i < _Kp; ++__i) 3471 __x._V_[__i] = _Vp[__i]; 3472 __x._Y_ = _Vp[_Kp]; 3473 } 3474 return __is; 3475} 3476 3477typedef shuffle_order_engine<minstd_rand0, 256> knuth_b; 3478 3479// random_device 3480 3481class _LIBCPP_TYPE_VIS random_device 3482{ 3483#ifdef _LIBCPP_USING_DEV_RANDOM 3484 int __f_; 3485#endif // defined(_LIBCPP_USING_DEV_RANDOM) 3486public: 3487 // types 3488 typedef unsigned result_type; 3489 3490 // generator characteristics 3491 static _LIBCPP_CONSTEXPR const result_type _Min = 0; 3492 static _LIBCPP_CONSTEXPR const result_type _Max = 0xFFFFFFFFu; 3493 3494 _LIBCPP_INLINE_VISIBILITY 3495 static _LIBCPP_CONSTEXPR result_type min() { return _Min;} 3496 _LIBCPP_INLINE_VISIBILITY 3497 static _LIBCPP_CONSTEXPR result_type max() { return _Max;} 3498 3499 // constructors 3500 explicit random_device(const string& __token = "/dev/urandom"); 3501 ~random_device(); 3502 3503 // generating functions 3504 result_type operator()(); 3505 3506 // property functions 3507 double entropy() const _NOEXCEPT; 3508 3509private: 3510 // no copy functions 3511 random_device(const random_device&); // = delete; 3512 random_device& operator=(const random_device&); // = delete; 3513}; 3514 3515// seed_seq 3516 3517class _LIBCPP_TEMPLATE_VIS seed_seq 3518{ 3519public: 3520 // types 3521 typedef uint32_t result_type; 3522 3523private: 3524 vector<result_type> __v_; 3525 3526 template<class _InputIterator> 3527 void init(_InputIterator __first, _InputIterator __last); 3528public: 3529 // constructors 3530 _LIBCPP_INLINE_VISIBILITY 3531 seed_seq() _NOEXCEPT {} 3532#ifndef _LIBCPP_CXX03_LANG 3533 template<class _Tp> 3534 _LIBCPP_INLINE_VISIBILITY 3535 seed_seq(initializer_list<_Tp> __il) {init(__il.begin(), __il.end());} 3536#endif // _LIBCPP_CXX03_LANG 3537 3538 template<class _InputIterator> 3539 _LIBCPP_INLINE_VISIBILITY 3540 seed_seq(_InputIterator __first, _InputIterator __last) 3541 {init(__first, __last);} 3542 3543 // generating functions 3544 template<class _RandomAccessIterator> 3545 void generate(_RandomAccessIterator __first, _RandomAccessIterator __last); 3546 3547 // property functions 3548 _LIBCPP_INLINE_VISIBILITY 3549 size_t size() const _NOEXCEPT {return __v_.size();} 3550 template<class _OutputIterator> 3551 _LIBCPP_INLINE_VISIBILITY 3552 void param(_OutputIterator __dest) const 3553 {_VSTD::copy(__v_.begin(), __v_.end(), __dest);} 3554 3555private: 3556 // no copy functions 3557 seed_seq(const seed_seq&); // = delete; 3558 void operator=(const seed_seq&); // = delete; 3559 3560 _LIBCPP_INLINE_VISIBILITY 3561 static result_type _Tp(result_type __x) {return __x ^ (__x >> 27);} 3562}; 3563 3564template<class _InputIterator> 3565void 3566seed_seq::init(_InputIterator __first, _InputIterator __last) 3567{ 3568 for (_InputIterator __s = __first; __s != __last; ++__s) 3569 __v_.push_back(*__s & 0xFFFFFFFF); 3570} 3571 3572template<class _RandomAccessIterator> 3573void 3574seed_seq::generate(_RandomAccessIterator __first, _RandomAccessIterator __last) 3575{ 3576 if (__first != __last) 3577 { 3578 _VSTD::fill(__first, __last, 0x8b8b8b8b); 3579 const size_t __n = static_cast<size_t>(__last - __first); 3580 const size_t __s = __v_.size(); 3581 const size_t __t = (__n >= 623) ? 11 3582 : (__n >= 68) ? 7 3583 : (__n >= 39) ? 5 3584 : (__n >= 7) ? 3 3585 : (__n - 1) / 2; 3586 const size_t __p = (__n - __t) / 2; 3587 const size_t __q = __p + __t; 3588 const size_t __m = _VSTD::max(__s + 1, __n); 3589 // __k = 0; 3590 { 3591 result_type __r = 1664525 * _Tp(__first[0] ^ __first[__p] 3592 ^ __first[__n - 1]); 3593 __first[__p] += __r; 3594 __r += __s; 3595 __first[__q] += __r; 3596 __first[0] = __r; 3597 } 3598 for (size_t __k = 1; __k <= __s; ++__k) 3599 { 3600 const size_t __kmodn = __k % __n; 3601 const size_t __kpmodn = (__k + __p) % __n; 3602 result_type __r = 1664525 * _Tp(__first[__kmodn] ^ __first[__kpmodn] 3603 ^ __first[(__k - 1) % __n]); 3604 __first[__kpmodn] += __r; 3605 __r += __kmodn + __v_[__k-1]; 3606 __first[(__k + __q) % __n] += __r; 3607 __first[__kmodn] = __r; 3608 } 3609 for (size_t __k = __s + 1; __k < __m; ++__k) 3610 { 3611 const size_t __kmodn = __k % __n; 3612 const size_t __kpmodn = (__k + __p) % __n; 3613 result_type __r = 1664525 * _Tp(__first[__kmodn] ^ __first[__kpmodn] 3614 ^ __first[(__k - 1) % __n]); 3615 __first[__kpmodn] += __r; 3616 __r += __kmodn; 3617 __first[(__k + __q) % __n] += __r; 3618 __first[__kmodn] = __r; 3619 } 3620 for (size_t __k = __m; __k < __m + __n; ++__k) 3621 { 3622 const size_t __kmodn = __k % __n; 3623 const size_t __kpmodn = (__k + __p) % __n; 3624 result_type __r = 1566083941 * _Tp(__first[__kmodn] + 3625 __first[__kpmodn] + 3626 __first[(__k - 1) % __n]); 3627 __first[__kpmodn] ^= __r; 3628 __r -= __kmodn; 3629 __first[(__k + __q) % __n] ^= __r; 3630 __first[__kmodn] = __r; 3631 } 3632 } 3633} 3634 3635// generate_canonical 3636 3637template<class _RealType, size_t __bits, class _URNG> 3638_RealType 3639generate_canonical(_URNG& __g) 3640{ 3641 const size_t _Dt = numeric_limits<_RealType>::digits; 3642 const size_t __b = _Dt < __bits ? _Dt : __bits; 3643#ifdef _LIBCPP_CXX03_LANG 3644 const size_t __logR = __log2<uint64_t, _URNG::_Max - _URNG::_Min + uint64_t(1)>::value; 3645#else 3646 const size_t __logR = __log2<uint64_t, _URNG::max() - _URNG::min() + uint64_t(1)>::value; 3647#endif 3648 const size_t __k = __b / __logR + (__b % __logR != 0) + (__b == 0); 3649 const _RealType _Rp = _URNG::max() - _URNG::min() + _RealType(1); 3650 _RealType __base = _Rp; 3651 _RealType _Sp = __g() - _URNG::min(); 3652 for (size_t __i = 1; __i < __k; ++__i, __base *= _Rp) 3653 _Sp += (__g() - _URNG::min()) * __base; 3654 return _Sp / __base; 3655} 3656 3657// uniform_int_distribution 3658 3659// in <algorithm> 3660 3661template <class _CharT, class _Traits, class _IT> 3662basic_ostream<_CharT, _Traits>& 3663operator<<(basic_ostream<_CharT, _Traits>& __os, 3664 const uniform_int_distribution<_IT>& __x) 3665{ 3666 __save_flags<_CharT, _Traits> __lx(__os); 3667 __os.flags(ios_base::dec | ios_base::left); 3668 _CharT __sp = __os.widen(' '); 3669 __os.fill(__sp); 3670 return __os << __x.a() << __sp << __x.b(); 3671} 3672 3673template <class _CharT, class _Traits, class _IT> 3674basic_istream<_CharT, _Traits>& 3675operator>>(basic_istream<_CharT, _Traits>& __is, 3676 uniform_int_distribution<_IT>& __x) 3677{ 3678 typedef uniform_int_distribution<_IT> _Eng; 3679 typedef typename _Eng::result_type result_type; 3680 typedef typename _Eng::param_type param_type; 3681 __save_flags<_CharT, _Traits> __lx(__is); 3682 __is.flags(ios_base::dec | ios_base::skipws); 3683 result_type __a; 3684 result_type __b; 3685 __is >> __a >> __b; 3686 if (!__is.fail()) 3687 __x.param(param_type(__a, __b)); 3688 return __is; 3689} 3690 3691// uniform_real_distribution 3692 3693template<class _RealType = double> 3694class _LIBCPP_TEMPLATE_VIS uniform_real_distribution 3695{ 3696public: 3697 // types 3698 typedef _RealType result_type; 3699 3700 class _LIBCPP_TEMPLATE_VIS param_type 3701 { 3702 result_type __a_; 3703 result_type __b_; 3704 public: 3705 typedef uniform_real_distribution distribution_type; 3706 3707 _LIBCPP_INLINE_VISIBILITY 3708 explicit param_type(result_type __a = 0, 3709 result_type __b = 1) 3710 : __a_(__a), __b_(__b) {} 3711 3712 _LIBCPP_INLINE_VISIBILITY 3713 result_type a() const {return __a_;} 3714 _LIBCPP_INLINE_VISIBILITY 3715 result_type b() const {return __b_;} 3716 3717 friend _LIBCPP_INLINE_VISIBILITY 3718 bool operator==(const param_type& __x, const param_type& __y) 3719 {return __x.__a_ == __y.__a_ && __x.__b_ == __y.__b_;} 3720 friend _LIBCPP_INLINE_VISIBILITY 3721 bool operator!=(const param_type& __x, const param_type& __y) 3722 {return !(__x == __y);} 3723 }; 3724 3725private: 3726 param_type __p_; 3727 3728public: 3729 // constructors and reset functions 3730 _LIBCPP_INLINE_VISIBILITY 3731 explicit uniform_real_distribution(result_type __a = 0, result_type __b = 1) 3732 : __p_(param_type(__a, __b)) {} 3733 _LIBCPP_INLINE_VISIBILITY 3734 explicit uniform_real_distribution(const param_type& __p) : __p_(__p) {} 3735 _LIBCPP_INLINE_VISIBILITY 3736 void reset() {} 3737 3738 // generating functions 3739 template<class _URNG> 3740 _LIBCPP_INLINE_VISIBILITY 3741 result_type operator()(_URNG& __g) 3742 {return (*this)(__g, __p_);} 3743 template<class _URNG> _LIBCPP_INLINE_VISIBILITY result_type operator()(_URNG& __g, const param_type& __p); 3744 3745 // property functions 3746 _LIBCPP_INLINE_VISIBILITY 3747 result_type a() const {return __p_.a();} 3748 _LIBCPP_INLINE_VISIBILITY 3749 result_type b() const {return __p_.b();} 3750 3751 _LIBCPP_INLINE_VISIBILITY 3752 param_type param() const {return __p_;} 3753 _LIBCPP_INLINE_VISIBILITY 3754 void param(const param_type& __p) {__p_ = __p;} 3755 3756 _LIBCPP_INLINE_VISIBILITY 3757 result_type min() const {return a();} 3758 _LIBCPP_INLINE_VISIBILITY 3759 result_type max() const {return b();} 3760 3761 friend _LIBCPP_INLINE_VISIBILITY 3762 bool operator==(const uniform_real_distribution& __x, 3763 const uniform_real_distribution& __y) 3764 {return __x.__p_ == __y.__p_;} 3765 friend _LIBCPP_INLINE_VISIBILITY 3766 bool operator!=(const uniform_real_distribution& __x, 3767 const uniform_real_distribution& __y) 3768 {return !(__x == __y);} 3769}; 3770 3771template<class _RealType> 3772template<class _URNG> 3773inline 3774typename uniform_real_distribution<_RealType>::result_type 3775uniform_real_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p) 3776{ 3777 return (__p.b() - __p.a()) 3778 * _VSTD::generate_canonical<_RealType, numeric_limits<_RealType>::digits>(__g) 3779 + __p.a(); 3780} 3781 3782template <class _CharT, class _Traits, class _RT> 3783basic_ostream<_CharT, _Traits>& 3784operator<<(basic_ostream<_CharT, _Traits>& __os, 3785 const uniform_real_distribution<_RT>& __x) 3786{ 3787 __save_flags<_CharT, _Traits> __lx(__os); 3788 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 3789 ios_base::scientific); 3790 _CharT __sp = __os.widen(' '); 3791 __os.fill(__sp); 3792 return __os << __x.a() << __sp << __x.b(); 3793} 3794 3795template <class _CharT, class _Traits, class _RT> 3796basic_istream<_CharT, _Traits>& 3797operator>>(basic_istream<_CharT, _Traits>& __is, 3798 uniform_real_distribution<_RT>& __x) 3799{ 3800 typedef uniform_real_distribution<_RT> _Eng; 3801 typedef typename _Eng::result_type result_type; 3802 typedef typename _Eng::param_type param_type; 3803 __save_flags<_CharT, _Traits> __lx(__is); 3804 __is.flags(ios_base::dec | ios_base::skipws); 3805 result_type __a; 3806 result_type __b; 3807 __is >> __a >> __b; 3808 if (!__is.fail()) 3809 __x.param(param_type(__a, __b)); 3810 return __is; 3811} 3812 3813// bernoulli_distribution 3814 3815class _LIBCPP_TEMPLATE_VIS bernoulli_distribution 3816{ 3817public: 3818 // types 3819 typedef bool result_type; 3820 3821 class _LIBCPP_TEMPLATE_VIS param_type 3822 { 3823 double __p_; 3824 public: 3825 typedef bernoulli_distribution distribution_type; 3826 3827 _LIBCPP_INLINE_VISIBILITY 3828 explicit param_type(double __p = 0.5) : __p_(__p) {} 3829 3830 _LIBCPP_INLINE_VISIBILITY 3831 double p() const {return __p_;} 3832 3833 friend _LIBCPP_INLINE_VISIBILITY 3834 bool operator==(const param_type& __x, const param_type& __y) 3835 {return __x.__p_ == __y.__p_;} 3836 friend _LIBCPP_INLINE_VISIBILITY 3837 bool operator!=(const param_type& __x, const param_type& __y) 3838 {return !(__x == __y);} 3839 }; 3840 3841private: 3842 param_type __p_; 3843 3844public: 3845 // constructors and reset functions 3846 _LIBCPP_INLINE_VISIBILITY 3847 explicit bernoulli_distribution(double __p = 0.5) 3848 : __p_(param_type(__p)) {} 3849 _LIBCPP_INLINE_VISIBILITY 3850 explicit bernoulli_distribution(const param_type& __p) : __p_(__p) {} 3851 _LIBCPP_INLINE_VISIBILITY 3852 void reset() {} 3853 3854 // generating functions 3855 template<class _URNG> 3856 _LIBCPP_INLINE_VISIBILITY 3857 result_type operator()(_URNG& __g) 3858 {return (*this)(__g, __p_);} 3859 template<class _URNG> _LIBCPP_INLINE_VISIBILITY result_type operator()(_URNG& __g, const param_type& __p); 3860 3861 // property functions 3862 _LIBCPP_INLINE_VISIBILITY 3863 double p() const {return __p_.p();} 3864 3865 _LIBCPP_INLINE_VISIBILITY 3866 param_type param() const {return __p_;} 3867 _LIBCPP_INLINE_VISIBILITY 3868 void param(const param_type& __p) {__p_ = __p;} 3869 3870 _LIBCPP_INLINE_VISIBILITY 3871 result_type min() const {return false;} 3872 _LIBCPP_INLINE_VISIBILITY 3873 result_type max() const {return true;} 3874 3875 friend _LIBCPP_INLINE_VISIBILITY 3876 bool operator==(const bernoulli_distribution& __x, 3877 const bernoulli_distribution& __y) 3878 {return __x.__p_ == __y.__p_;} 3879 friend _LIBCPP_INLINE_VISIBILITY 3880 bool operator!=(const bernoulli_distribution& __x, 3881 const bernoulli_distribution& __y) 3882 {return !(__x == __y);} 3883}; 3884 3885template<class _URNG> 3886inline 3887bernoulli_distribution::result_type 3888bernoulli_distribution::operator()(_URNG& __g, const param_type& __p) 3889{ 3890 uniform_real_distribution<double> __gen; 3891 return __gen(__g) < __p.p(); 3892} 3893 3894template <class _CharT, class _Traits> 3895basic_ostream<_CharT, _Traits>& 3896operator<<(basic_ostream<_CharT, _Traits>& __os, const bernoulli_distribution& __x) 3897{ 3898 __save_flags<_CharT, _Traits> __lx(__os); 3899 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 3900 ios_base::scientific); 3901 _CharT __sp = __os.widen(' '); 3902 __os.fill(__sp); 3903 return __os << __x.p(); 3904} 3905 3906template <class _CharT, class _Traits> 3907basic_istream<_CharT, _Traits>& 3908operator>>(basic_istream<_CharT, _Traits>& __is, bernoulli_distribution& __x) 3909{ 3910 typedef bernoulli_distribution _Eng; 3911 typedef typename _Eng::param_type param_type; 3912 __save_flags<_CharT, _Traits> __lx(__is); 3913 __is.flags(ios_base::dec | ios_base::skipws); 3914 double __p; 3915 __is >> __p; 3916 if (!__is.fail()) 3917 __x.param(param_type(__p)); 3918 return __is; 3919} 3920 3921// binomial_distribution 3922 3923template<class _IntType = int> 3924class _LIBCPP_TEMPLATE_VIS binomial_distribution 3925{ 3926public: 3927 // types 3928 typedef _IntType result_type; 3929 3930 class _LIBCPP_TEMPLATE_VIS param_type 3931 { 3932 result_type __t_; 3933 double __p_; 3934 double __pr_; 3935 double __odds_ratio_; 3936 result_type __r0_; 3937 public: 3938 typedef binomial_distribution distribution_type; 3939 3940 explicit param_type(result_type __t = 1, double __p = 0.5); 3941 3942 _LIBCPP_INLINE_VISIBILITY 3943 result_type t() const {return __t_;} 3944 _LIBCPP_INLINE_VISIBILITY 3945 double p() const {return __p_;} 3946 3947 friend _LIBCPP_INLINE_VISIBILITY 3948 bool operator==(const param_type& __x, const param_type& __y) 3949 {return __x.__t_ == __y.__t_ && __x.__p_ == __y.__p_;} 3950 friend _LIBCPP_INLINE_VISIBILITY 3951 bool operator!=(const param_type& __x, const param_type& __y) 3952 {return !(__x == __y);} 3953 3954 friend class binomial_distribution; 3955 }; 3956 3957private: 3958 param_type __p_; 3959 3960public: 3961 // constructors and reset functions 3962 _LIBCPP_INLINE_VISIBILITY 3963 explicit binomial_distribution(result_type __t = 1, double __p = 0.5) 3964 : __p_(param_type(__t, __p)) {} 3965 _LIBCPP_INLINE_VISIBILITY 3966 explicit binomial_distribution(const param_type& __p) : __p_(__p) {} 3967 _LIBCPP_INLINE_VISIBILITY 3968 void reset() {} 3969 3970 // generating functions 3971 template<class _URNG> 3972 _LIBCPP_INLINE_VISIBILITY 3973 result_type operator()(_URNG& __g) 3974 {return (*this)(__g, __p_);} 3975 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 3976 3977 // property functions 3978 _LIBCPP_INLINE_VISIBILITY 3979 result_type t() const {return __p_.t();} 3980 _LIBCPP_INLINE_VISIBILITY 3981 double p() const {return __p_.p();} 3982 3983 _LIBCPP_INLINE_VISIBILITY 3984 param_type param() const {return __p_;} 3985 _LIBCPP_INLINE_VISIBILITY 3986 void param(const param_type& __p) {__p_ = __p;} 3987 3988 _LIBCPP_INLINE_VISIBILITY 3989 result_type min() const {return 0;} 3990 _LIBCPP_INLINE_VISIBILITY 3991 result_type max() const {return t();} 3992 3993 friend _LIBCPP_INLINE_VISIBILITY 3994 bool operator==(const binomial_distribution& __x, 3995 const binomial_distribution& __y) 3996 {return __x.__p_ == __y.__p_;} 3997 friend _LIBCPP_INLINE_VISIBILITY 3998 bool operator!=(const binomial_distribution& __x, 3999 const binomial_distribution& __y) 4000 {return !(__x == __y);} 4001}; 4002 4003#ifndef _LIBCPP_MSVCRT 4004extern "C" double lgamma_r(double, int *); 4005#endif 4006 4007inline _LIBCPP_INLINE_VISIBILITY double __libcpp_lgamma(double __d) { 4008#if defined(_LIBCPP_MSVCRT) 4009 return lgamma(__d); 4010#else 4011 int __sign; 4012 return lgamma_r(__d, &__sign); 4013#endif 4014} 4015 4016template<class _IntType> 4017binomial_distribution<_IntType>::param_type::param_type(const result_type __t, const double __p) 4018 : __t_(__t), __p_(__p) 4019{ 4020 if (0 < __p_ && __p_ < 1) 4021 { 4022 __r0_ = static_cast<result_type>((__t_ + 1) * __p_); 4023 __pr_ = _VSTD::exp(__libcpp_lgamma(__t_ + 1.) - 4024 __libcpp_lgamma(__r0_ + 1.) - 4025 __libcpp_lgamma(__t_ - __r0_ + 1.) + __r0_ * _VSTD::log(__p_) + 4026 (__t_ - __r0_) * _VSTD::log(1 - __p_)); 4027 __odds_ratio_ = __p_ / (1 - __p_); 4028 } 4029} 4030 4031// Reference: Kemp, C.D. (1986). `A modal method for generating binomial 4032// variables', Commun. Statist. - Theor. Meth. 15(3), 805-813. 4033template<class _IntType> 4034template<class _URNG> 4035_IntType 4036binomial_distribution<_IntType>::operator()(_URNG& __g, const param_type& __pr) 4037{ 4038 if (__pr.__t_ == 0 || __pr.__p_ == 0) 4039 return 0; 4040 if (__pr.__p_ == 1) 4041 return __pr.__t_; 4042 uniform_real_distribution<double> __gen; 4043 double __u = __gen(__g) - __pr.__pr_; 4044 if (__u < 0) 4045 return __pr.__r0_; 4046 double __pu = __pr.__pr_; 4047 double __pd = __pu; 4048 result_type __ru = __pr.__r0_; 4049 result_type __rd = __ru; 4050 while (true) 4051 { 4052 if (__rd >= 1) 4053 { 4054 __pd *= __rd / (__pr.__odds_ratio_ * (__pr.__t_ - __rd + 1)); 4055 __u -= __pd; 4056 if (__u < 0) 4057 return __rd - 1; 4058 } 4059 if ( __rd != 0 ) 4060 --__rd; 4061 ++__ru; 4062 if (__ru <= __pr.__t_) 4063 { 4064 __pu *= (__pr.__t_ - __ru + 1) * __pr.__odds_ratio_ / __ru; 4065 __u -= __pu; 4066 if (__u < 0) 4067 return __ru; 4068 } 4069 } 4070} 4071 4072template <class _CharT, class _Traits, class _IntType> 4073basic_ostream<_CharT, _Traits>& 4074operator<<(basic_ostream<_CharT, _Traits>& __os, 4075 const binomial_distribution<_IntType>& __x) 4076{ 4077 __save_flags<_CharT, _Traits> __lx(__os); 4078 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 4079 ios_base::scientific); 4080 _CharT __sp = __os.widen(' '); 4081 __os.fill(__sp); 4082 return __os << __x.t() << __sp << __x.p(); 4083} 4084 4085template <class _CharT, class _Traits, class _IntType> 4086basic_istream<_CharT, _Traits>& 4087operator>>(basic_istream<_CharT, _Traits>& __is, 4088 binomial_distribution<_IntType>& __x) 4089{ 4090 typedef binomial_distribution<_IntType> _Eng; 4091 typedef typename _Eng::result_type result_type; 4092 typedef typename _Eng::param_type param_type; 4093 __save_flags<_CharT, _Traits> __lx(__is); 4094 __is.flags(ios_base::dec | ios_base::skipws); 4095 result_type __t; 4096 double __p; 4097 __is >> __t >> __p; 4098 if (!__is.fail()) 4099 __x.param(param_type(__t, __p)); 4100 return __is; 4101} 4102 4103// exponential_distribution 4104 4105template<class _RealType = double> 4106class _LIBCPP_TEMPLATE_VIS exponential_distribution 4107{ 4108public: 4109 // types 4110 typedef _RealType result_type; 4111 4112 class _LIBCPP_TEMPLATE_VIS param_type 4113 { 4114 result_type __lambda_; 4115 public: 4116 typedef exponential_distribution distribution_type; 4117 4118 _LIBCPP_INLINE_VISIBILITY 4119 explicit param_type(result_type __lambda = 1) : __lambda_(__lambda) {} 4120 4121 _LIBCPP_INLINE_VISIBILITY 4122 result_type lambda() const {return __lambda_;} 4123 4124 friend _LIBCPP_INLINE_VISIBILITY 4125 bool operator==(const param_type& __x, const param_type& __y) 4126 {return __x.__lambda_ == __y.__lambda_;} 4127 friend _LIBCPP_INLINE_VISIBILITY 4128 bool operator!=(const param_type& __x, const param_type& __y) 4129 {return !(__x == __y);} 4130 }; 4131 4132private: 4133 param_type __p_; 4134 4135public: 4136 // constructors and reset functions 4137 _LIBCPP_INLINE_VISIBILITY 4138 explicit exponential_distribution(result_type __lambda = 1) 4139 : __p_(param_type(__lambda)) {} 4140 _LIBCPP_INLINE_VISIBILITY 4141 explicit exponential_distribution(const param_type& __p) : __p_(__p) {} 4142 _LIBCPP_INLINE_VISIBILITY 4143 void reset() {} 4144 4145 // generating functions 4146 template<class _URNG> 4147 _LIBCPP_INLINE_VISIBILITY 4148 result_type operator()(_URNG& __g) 4149 {return (*this)(__g, __p_);} 4150 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 4151 4152 // property functions 4153 _LIBCPP_INLINE_VISIBILITY 4154 result_type lambda() const {return __p_.lambda();} 4155 4156 _LIBCPP_INLINE_VISIBILITY 4157 param_type param() const {return __p_;} 4158 _LIBCPP_INLINE_VISIBILITY 4159 void param(const param_type& __p) {__p_ = __p;} 4160 4161 _LIBCPP_INLINE_VISIBILITY 4162 result_type min() const {return 0;} 4163 _LIBCPP_INLINE_VISIBILITY 4164 result_type max() const {return numeric_limits<result_type>::infinity();} 4165 4166 friend _LIBCPP_INLINE_VISIBILITY 4167 bool operator==(const exponential_distribution& __x, 4168 const exponential_distribution& __y) 4169 {return __x.__p_ == __y.__p_;} 4170 friend _LIBCPP_INLINE_VISIBILITY 4171 bool operator!=(const exponential_distribution& __x, 4172 const exponential_distribution& __y) 4173 {return !(__x == __y);} 4174}; 4175 4176template <class _RealType> 4177template<class _URNG> 4178_RealType 4179exponential_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p) 4180{ 4181 return -_VSTD::log 4182 ( 4183 result_type(1) - 4184 _VSTD::generate_canonical<result_type, 4185 numeric_limits<result_type>::digits>(__g) 4186 ) 4187 / __p.lambda(); 4188} 4189 4190template <class _CharT, class _Traits, class _RealType> 4191basic_ostream<_CharT, _Traits>& 4192operator<<(basic_ostream<_CharT, _Traits>& __os, 4193 const exponential_distribution<_RealType>& __x) 4194{ 4195 __save_flags<_CharT, _Traits> __lx(__os); 4196 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 4197 ios_base::scientific); 4198 return __os << __x.lambda(); 4199} 4200 4201template <class _CharT, class _Traits, class _RealType> 4202basic_istream<_CharT, _Traits>& 4203operator>>(basic_istream<_CharT, _Traits>& __is, 4204 exponential_distribution<_RealType>& __x) 4205{ 4206 typedef exponential_distribution<_RealType> _Eng; 4207 typedef typename _Eng::result_type result_type; 4208 typedef typename _Eng::param_type param_type; 4209 __save_flags<_CharT, _Traits> __lx(__is); 4210 __is.flags(ios_base::dec | ios_base::skipws); 4211 result_type __lambda; 4212 __is >> __lambda; 4213 if (!__is.fail()) 4214 __x.param(param_type(__lambda)); 4215 return __is; 4216} 4217 4218// normal_distribution 4219 4220template<class _RealType = double> 4221class _LIBCPP_TEMPLATE_VIS normal_distribution 4222{ 4223public: 4224 // types 4225 typedef _RealType result_type; 4226 4227 class _LIBCPP_TEMPLATE_VIS param_type 4228 { 4229 result_type __mean_; 4230 result_type __stddev_; 4231 public: 4232 typedef normal_distribution distribution_type; 4233 4234 _LIBCPP_INLINE_VISIBILITY 4235 explicit param_type(result_type __mean = 0, result_type __stddev = 1) 4236 : __mean_(__mean), __stddev_(__stddev) {} 4237 4238 _LIBCPP_INLINE_VISIBILITY 4239 result_type mean() const {return __mean_;} 4240 _LIBCPP_INLINE_VISIBILITY 4241 result_type stddev() const {return __stddev_;} 4242 4243 friend _LIBCPP_INLINE_VISIBILITY 4244 bool operator==(const param_type& __x, const param_type& __y) 4245 {return __x.__mean_ == __y.__mean_ && __x.__stddev_ == __y.__stddev_;} 4246 friend _LIBCPP_INLINE_VISIBILITY 4247 bool operator!=(const param_type& __x, const param_type& __y) 4248 {return !(__x == __y);} 4249 }; 4250 4251private: 4252 param_type __p_; 4253 result_type _V_; 4254 bool _V_hot_; 4255 4256public: 4257 // constructors and reset functions 4258 _LIBCPP_INLINE_VISIBILITY 4259 explicit normal_distribution(result_type __mean = 0, result_type __stddev = 1) 4260 : __p_(param_type(__mean, __stddev)), _V_hot_(false) {} 4261 _LIBCPP_INLINE_VISIBILITY 4262 explicit normal_distribution(const param_type& __p) 4263 : __p_(__p), _V_hot_(false) {} 4264 _LIBCPP_INLINE_VISIBILITY 4265 void reset() {_V_hot_ = false;} 4266 4267 // generating functions 4268 template<class _URNG> 4269 _LIBCPP_INLINE_VISIBILITY 4270 result_type operator()(_URNG& __g) 4271 {return (*this)(__g, __p_);} 4272 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 4273 4274 // property functions 4275 _LIBCPP_INLINE_VISIBILITY 4276 result_type mean() const {return __p_.mean();} 4277 _LIBCPP_INLINE_VISIBILITY 4278 result_type stddev() const {return __p_.stddev();} 4279 4280 _LIBCPP_INLINE_VISIBILITY 4281 param_type param() const {return __p_;} 4282 _LIBCPP_INLINE_VISIBILITY 4283 void param(const param_type& __p) {__p_ = __p;} 4284 4285 _LIBCPP_INLINE_VISIBILITY 4286 result_type min() const {return -numeric_limits<result_type>::infinity();} 4287 _LIBCPP_INLINE_VISIBILITY 4288 result_type max() const {return numeric_limits<result_type>::infinity();} 4289 4290 friend _LIBCPP_INLINE_VISIBILITY 4291 bool operator==(const normal_distribution& __x, 4292 const normal_distribution& __y) 4293 {return __x.__p_ == __y.__p_ && __x._V_hot_ == __y._V_hot_ && 4294 (!__x._V_hot_ || __x._V_ == __y._V_);} 4295 friend _LIBCPP_INLINE_VISIBILITY 4296 bool operator!=(const normal_distribution& __x, 4297 const normal_distribution& __y) 4298 {return !(__x == __y);} 4299 4300 template <class _CharT, class _Traits, class _RT> 4301 friend 4302 basic_ostream<_CharT, _Traits>& 4303 operator<<(basic_ostream<_CharT, _Traits>& __os, 4304 const normal_distribution<_RT>& __x); 4305 4306 template <class _CharT, class _Traits, class _RT> 4307 friend 4308 basic_istream<_CharT, _Traits>& 4309 operator>>(basic_istream<_CharT, _Traits>& __is, 4310 normal_distribution<_RT>& __x); 4311}; 4312 4313template <class _RealType> 4314template<class _URNG> 4315_RealType 4316normal_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p) 4317{ 4318 result_type _Up; 4319 if (_V_hot_) 4320 { 4321 _V_hot_ = false; 4322 _Up = _V_; 4323 } 4324 else 4325 { 4326 uniform_real_distribution<result_type> _Uni(-1, 1); 4327 result_type __u; 4328 result_type __v; 4329 result_type __s; 4330 do 4331 { 4332 __u = _Uni(__g); 4333 __v = _Uni(__g); 4334 __s = __u * __u + __v * __v; 4335 } while (__s > 1 || __s == 0); 4336 result_type _Fp = _VSTD::sqrt(-2 * _VSTD::log(__s) / __s); 4337 _V_ = __v * _Fp; 4338 _V_hot_ = true; 4339 _Up = __u * _Fp; 4340 } 4341 return _Up * __p.stddev() + __p.mean(); 4342} 4343 4344template <class _CharT, class _Traits, class _RT> 4345basic_ostream<_CharT, _Traits>& 4346operator<<(basic_ostream<_CharT, _Traits>& __os, 4347 const normal_distribution<_RT>& __x) 4348{ 4349 __save_flags<_CharT, _Traits> __lx(__os); 4350 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 4351 ios_base::scientific); 4352 _CharT __sp = __os.widen(' '); 4353 __os.fill(__sp); 4354 __os << __x.mean() << __sp << __x.stddev() << __sp << __x._V_hot_; 4355 if (__x._V_hot_) 4356 __os << __sp << __x._V_; 4357 return __os; 4358} 4359 4360template <class _CharT, class _Traits, class _RT> 4361basic_istream<_CharT, _Traits>& 4362operator>>(basic_istream<_CharT, _Traits>& __is, 4363 normal_distribution<_RT>& __x) 4364{ 4365 typedef normal_distribution<_RT> _Eng; 4366 typedef typename _Eng::result_type result_type; 4367 typedef typename _Eng::param_type param_type; 4368 __save_flags<_CharT, _Traits> __lx(__is); 4369 __is.flags(ios_base::dec | ios_base::skipws); 4370 result_type __mean; 4371 result_type __stddev; 4372 result_type _Vp = 0; 4373 bool _V_hot = false; 4374 __is >> __mean >> __stddev >> _V_hot; 4375 if (_V_hot) 4376 __is >> _Vp; 4377 if (!__is.fail()) 4378 { 4379 __x.param(param_type(__mean, __stddev)); 4380 __x._V_hot_ = _V_hot; 4381 __x._V_ = _Vp; 4382 } 4383 return __is; 4384} 4385 4386// lognormal_distribution 4387 4388template<class _RealType = double> 4389class _LIBCPP_TEMPLATE_VIS lognormal_distribution 4390{ 4391public: 4392 // types 4393 typedef _RealType result_type; 4394 4395 class _LIBCPP_TEMPLATE_VIS param_type 4396 { 4397 normal_distribution<result_type> __nd_; 4398 public: 4399 typedef lognormal_distribution distribution_type; 4400 4401 _LIBCPP_INLINE_VISIBILITY 4402 explicit param_type(result_type __m = 0, result_type __s = 1) 4403 : __nd_(__m, __s) {} 4404 4405 _LIBCPP_INLINE_VISIBILITY 4406 result_type m() const {return __nd_.mean();} 4407 _LIBCPP_INLINE_VISIBILITY 4408 result_type s() const {return __nd_.stddev();} 4409 4410 friend _LIBCPP_INLINE_VISIBILITY 4411 bool operator==(const param_type& __x, const param_type& __y) 4412 {return __x.__nd_ == __y.__nd_;} 4413 friend _LIBCPP_INLINE_VISIBILITY 4414 bool operator!=(const param_type& __x, const param_type& __y) 4415 {return !(__x == __y);} 4416 friend class lognormal_distribution; 4417 4418 template <class _CharT, class _Traits, class _RT> 4419 friend 4420 basic_ostream<_CharT, _Traits>& 4421 operator<<(basic_ostream<_CharT, _Traits>& __os, 4422 const lognormal_distribution<_RT>& __x); 4423 4424 template <class _CharT, class _Traits, class _RT> 4425 friend 4426 basic_istream<_CharT, _Traits>& 4427 operator>>(basic_istream<_CharT, _Traits>& __is, 4428 lognormal_distribution<_RT>& __x); 4429 }; 4430 4431private: 4432 param_type __p_; 4433 4434public: 4435 // constructor and reset functions 4436 _LIBCPP_INLINE_VISIBILITY 4437 explicit lognormal_distribution(result_type __m = 0, result_type __s = 1) 4438 : __p_(param_type(__m, __s)) {} 4439 _LIBCPP_INLINE_VISIBILITY 4440 explicit lognormal_distribution(const param_type& __p) 4441 : __p_(__p) {} 4442 _LIBCPP_INLINE_VISIBILITY 4443 void reset() {__p_.__nd_.reset();} 4444 4445 // generating functions 4446 template<class _URNG> 4447 _LIBCPP_INLINE_VISIBILITY 4448 result_type operator()(_URNG& __g) 4449 {return (*this)(__g, __p_);} 4450 template<class _URNG> 4451 _LIBCPP_INLINE_VISIBILITY 4452 result_type operator()(_URNG& __g, const param_type& __p) 4453 {return _VSTD::exp(const_cast<normal_distribution<result_type>&>(__p.__nd_)(__g));} 4454 4455 // property functions 4456 _LIBCPP_INLINE_VISIBILITY 4457 result_type m() const {return __p_.m();} 4458 _LIBCPP_INLINE_VISIBILITY 4459 result_type s() const {return __p_.s();} 4460 4461 _LIBCPP_INLINE_VISIBILITY 4462 param_type param() const {return __p_;} 4463 _LIBCPP_INLINE_VISIBILITY 4464 void param(const param_type& __p) {__p_ = __p;} 4465 4466 _LIBCPP_INLINE_VISIBILITY 4467 result_type min() const {return 0;} 4468 _LIBCPP_INLINE_VISIBILITY 4469 result_type max() const {return numeric_limits<result_type>::infinity();} 4470 4471 friend _LIBCPP_INLINE_VISIBILITY 4472 bool operator==(const lognormal_distribution& __x, 4473 const lognormal_distribution& __y) 4474 {return __x.__p_ == __y.__p_;} 4475 friend _LIBCPP_INLINE_VISIBILITY 4476 bool operator!=(const lognormal_distribution& __x, 4477 const lognormal_distribution& __y) 4478 {return !(__x == __y);} 4479 4480 template <class _CharT, class _Traits, class _RT> 4481 friend 4482 basic_ostream<_CharT, _Traits>& 4483 operator<<(basic_ostream<_CharT, _Traits>& __os, 4484 const lognormal_distribution<_RT>& __x); 4485 4486 template <class _CharT, class _Traits, class _RT> 4487 friend 4488 basic_istream<_CharT, _Traits>& 4489 operator>>(basic_istream<_CharT, _Traits>& __is, 4490 lognormal_distribution<_RT>& __x); 4491}; 4492 4493template <class _CharT, class _Traits, class _RT> 4494inline _LIBCPP_INLINE_VISIBILITY 4495basic_ostream<_CharT, _Traits>& 4496operator<<(basic_ostream<_CharT, _Traits>& __os, 4497 const lognormal_distribution<_RT>& __x) 4498{ 4499 return __os << __x.__p_.__nd_; 4500} 4501 4502template <class _CharT, class _Traits, class _RT> 4503inline _LIBCPP_INLINE_VISIBILITY 4504basic_istream<_CharT, _Traits>& 4505operator>>(basic_istream<_CharT, _Traits>& __is, 4506 lognormal_distribution<_RT>& __x) 4507{ 4508 return __is >> __x.__p_.__nd_; 4509} 4510 4511// poisson_distribution 4512 4513template<class _IntType = int> 4514class _LIBCPP_TEMPLATE_VIS poisson_distribution 4515{ 4516public: 4517 // types 4518 typedef _IntType result_type; 4519 4520 class _LIBCPP_TEMPLATE_VIS param_type 4521 { 4522 double __mean_; 4523 double __s_; 4524 double __d_; 4525 double __l_; 4526 double __omega_; 4527 double __c0_; 4528 double __c1_; 4529 double __c2_; 4530 double __c3_; 4531 double __c_; 4532 4533 public: 4534 typedef poisson_distribution distribution_type; 4535 4536 explicit param_type(double __mean = 1.0); 4537 4538 _LIBCPP_INLINE_VISIBILITY 4539 double mean() const {return __mean_;} 4540 4541 friend _LIBCPP_INLINE_VISIBILITY 4542 bool operator==(const param_type& __x, const param_type& __y) 4543 {return __x.__mean_ == __y.__mean_;} 4544 friend _LIBCPP_INLINE_VISIBILITY 4545 bool operator!=(const param_type& __x, const param_type& __y) 4546 {return !(__x == __y);} 4547 4548 friend class poisson_distribution; 4549 }; 4550 4551private: 4552 param_type __p_; 4553 4554public: 4555 // constructors and reset functions 4556 _LIBCPP_INLINE_VISIBILITY 4557 explicit poisson_distribution(double __mean = 1.0) : __p_(__mean) {} 4558 _LIBCPP_INLINE_VISIBILITY 4559 explicit poisson_distribution(const param_type& __p) : __p_(__p) {} 4560 _LIBCPP_INLINE_VISIBILITY 4561 void reset() {} 4562 4563 // generating functions 4564 template<class _URNG> 4565 _LIBCPP_INLINE_VISIBILITY 4566 result_type operator()(_URNG& __g) 4567 {return (*this)(__g, __p_);} 4568 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 4569 4570 // property functions 4571 _LIBCPP_INLINE_VISIBILITY 4572 double mean() const {return __p_.mean();} 4573 4574 _LIBCPP_INLINE_VISIBILITY 4575 param_type param() const {return __p_;} 4576 _LIBCPP_INLINE_VISIBILITY 4577 void param(const param_type& __p) {__p_ = __p;} 4578 4579 _LIBCPP_INLINE_VISIBILITY 4580 result_type min() const {return 0;} 4581 _LIBCPP_INLINE_VISIBILITY 4582 result_type max() const {return numeric_limits<result_type>::max();} 4583 4584 friend _LIBCPP_INLINE_VISIBILITY 4585 bool operator==(const poisson_distribution& __x, 4586 const poisson_distribution& __y) 4587 {return __x.__p_ == __y.__p_;} 4588 friend _LIBCPP_INLINE_VISIBILITY 4589 bool operator!=(const poisson_distribution& __x, 4590 const poisson_distribution& __y) 4591 {return !(__x == __y);} 4592}; 4593 4594template<class _IntType> 4595poisson_distribution<_IntType>::param_type::param_type(double __mean) 4596 // According to the standard `inf` is a valid input, but it causes the 4597 // distribution to hang, so we replace it with the maximum representable 4598 // mean. 4599 : __mean_(isinf(__mean) ? numeric_limits<double>::max() : __mean) 4600{ 4601 if (__mean_ < 10) 4602 { 4603 __s_ = 0; 4604 __d_ = 0; 4605 __l_ = _VSTD::exp(-__mean_); 4606 __omega_ = 0; 4607 __c3_ = 0; 4608 __c2_ = 0; 4609 __c1_ = 0; 4610 __c0_ = 0; 4611 __c_ = 0; 4612 } 4613 else 4614 { 4615 __s_ = _VSTD::sqrt(__mean_); 4616 __d_ = 6 * __mean_ * __mean_; 4617 __l_ = std::trunc(__mean_ - 1.1484); 4618 __omega_ = .3989423 / __s_; 4619 double __b1_ = .4166667E-1 / __mean_; 4620 double __b2_ = .3 * __b1_ * __b1_; 4621 __c3_ = .1428571 * __b1_ * __b2_; 4622 __c2_ = __b2_ - 15. * __c3_; 4623 __c1_ = __b1_ - 6. * __b2_ + 45. * __c3_; 4624 __c0_ = 1. - __b1_ + 3. * __b2_ - 15. * __c3_; 4625 __c_ = .1069 / __mean_; 4626 } 4627} 4628 4629template <class _IntType> 4630template<class _URNG> 4631_IntType 4632poisson_distribution<_IntType>::operator()(_URNG& __urng, const param_type& __pr) 4633{ 4634 double __tx; 4635 uniform_real_distribution<double> __urd; 4636 if (__pr.__mean_ < 10) 4637 { 4638 __tx = 0; 4639 for (double __p = __urd(__urng); __p > __pr.__l_; ++__tx) 4640 __p *= __urd(__urng); 4641 } 4642 else 4643 { 4644 double __difmuk; 4645 double __g = __pr.__mean_ + __pr.__s_ * normal_distribution<double>()(__urng); 4646 double __u; 4647 if (__g > 0) 4648 { 4649 __tx = std::trunc(__g); 4650 if (__tx >= __pr.__l_) 4651 return std::__clamp_to_integral<result_type>(__tx); 4652 __difmuk = __pr.__mean_ - __tx; 4653 __u = __urd(__urng); 4654 if (__pr.__d_ * __u >= __difmuk * __difmuk * __difmuk) 4655 return std::__clamp_to_integral<result_type>(__tx); 4656 } 4657 exponential_distribution<double> __edist; 4658 for (bool __using_exp_dist = false; true; __using_exp_dist = true) 4659 { 4660 double __e; 4661 if (__using_exp_dist || __g <= 0) 4662 { 4663 double __t; 4664 do 4665 { 4666 __e = __edist(__urng); 4667 __u = __urd(__urng); 4668 __u += __u - 1; 4669 __t = 1.8 + (__u < 0 ? -__e : __e); 4670 } while (__t <= -.6744); 4671 __tx = std::trunc(__pr.__mean_ + __pr.__s_ * __t); 4672 __difmuk = __pr.__mean_ - __tx; 4673 __using_exp_dist = true; 4674 } 4675 double __px; 4676 double __py; 4677 if (__tx < 10 && __tx >= 0) 4678 { 4679 const double __fac[] = {1, 1, 2, 6, 24, 120, 720, 5040, 4680 40320, 362880}; 4681 __px = -__pr.__mean_; 4682 __py = _VSTD::pow(__pr.__mean_, (double)__tx) / __fac[static_cast<int>(__tx)]; 4683 } 4684 else 4685 { 4686 double __del = .8333333E-1 / __tx; 4687 __del -= 4.8 * __del * __del * __del; 4688 double __v = __difmuk / __tx; 4689 if (_VSTD::abs(__v) > 0.25) 4690 __px = __tx * _VSTD::log(1 + __v) - __difmuk - __del; 4691 else 4692 __px = __tx * __v * __v * (((((((.1250060 * __v + -.1384794) * 4693 __v + .1421878) * __v + -.1661269) * __v + .2000118) * 4694 __v + -.2500068) * __v + .3333333) * __v + -.5) - __del; 4695 __py = .3989423 / _VSTD::sqrt(__tx); 4696 } 4697 double __r = (0.5 - __difmuk) / __pr.__s_; 4698 double __r2 = __r * __r; 4699 double __fx = -0.5 * __r2; 4700 double __fy = __pr.__omega_ * (((__pr.__c3_ * __r2 + __pr.__c2_) * 4701 __r2 + __pr.__c1_) * __r2 + __pr.__c0_); 4702 if (__using_exp_dist) 4703 { 4704 if (__pr.__c_ * _VSTD::abs(__u) <= __py * _VSTD::exp(__px + __e) - 4705 __fy * _VSTD::exp(__fx + __e)) 4706 break; 4707 } 4708 else 4709 { 4710 if (__fy - __u * __fy <= __py * _VSTD::exp(__px - __fx)) 4711 break; 4712 } 4713 } 4714 } 4715 return std::__clamp_to_integral<result_type>(__tx); 4716} 4717 4718template <class _CharT, class _Traits, class _IntType> 4719basic_ostream<_CharT, _Traits>& 4720operator<<(basic_ostream<_CharT, _Traits>& __os, 4721 const poisson_distribution<_IntType>& __x) 4722{ 4723 __save_flags<_CharT, _Traits> __lx(__os); 4724 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 4725 ios_base::scientific); 4726 return __os << __x.mean(); 4727} 4728 4729template <class _CharT, class _Traits, class _IntType> 4730basic_istream<_CharT, _Traits>& 4731operator>>(basic_istream<_CharT, _Traits>& __is, 4732 poisson_distribution<_IntType>& __x) 4733{ 4734 typedef poisson_distribution<_IntType> _Eng; 4735 typedef typename _Eng::param_type param_type; 4736 __save_flags<_CharT, _Traits> __lx(__is); 4737 __is.flags(ios_base::dec | ios_base::skipws); 4738 double __mean; 4739 __is >> __mean; 4740 if (!__is.fail()) 4741 __x.param(param_type(__mean)); 4742 return __is; 4743} 4744 4745// weibull_distribution 4746 4747template<class _RealType = double> 4748class _LIBCPP_TEMPLATE_VIS weibull_distribution 4749{ 4750public: 4751 // types 4752 typedef _RealType result_type; 4753 4754 class _LIBCPP_TEMPLATE_VIS param_type 4755 { 4756 result_type __a_; 4757 result_type __b_; 4758 public: 4759 typedef weibull_distribution distribution_type; 4760 4761 _LIBCPP_INLINE_VISIBILITY 4762 explicit param_type(result_type __a = 1, result_type __b = 1) 4763 : __a_(__a), __b_(__b) {} 4764 4765 _LIBCPP_INLINE_VISIBILITY 4766 result_type a() const {return __a_;} 4767 _LIBCPP_INLINE_VISIBILITY 4768 result_type b() const {return __b_;} 4769 4770 friend _LIBCPP_INLINE_VISIBILITY 4771 bool operator==(const param_type& __x, const param_type& __y) 4772 {return __x.__a_ == __y.__a_ && __x.__b_ == __y.__b_;} 4773 friend _LIBCPP_INLINE_VISIBILITY 4774 bool operator!=(const param_type& __x, const param_type& __y) 4775 {return !(__x == __y);} 4776 }; 4777 4778private: 4779 param_type __p_; 4780 4781public: 4782 // constructor and reset functions 4783 _LIBCPP_INLINE_VISIBILITY 4784 explicit weibull_distribution(result_type __a = 1, result_type __b = 1) 4785 : __p_(param_type(__a, __b)) {} 4786 _LIBCPP_INLINE_VISIBILITY 4787 explicit weibull_distribution(const param_type& __p) 4788 : __p_(__p) {} 4789 _LIBCPP_INLINE_VISIBILITY 4790 void reset() {} 4791 4792 // generating functions 4793 template<class _URNG> 4794 _LIBCPP_INLINE_VISIBILITY 4795 result_type operator()(_URNG& __g) 4796 {return (*this)(__g, __p_);} 4797 template<class _URNG> 4798 _LIBCPP_INLINE_VISIBILITY 4799 result_type operator()(_URNG& __g, const param_type& __p) 4800 {return __p.b() * 4801 _VSTD::pow(exponential_distribution<result_type>()(__g), 1/__p.a());} 4802 4803 // property functions 4804 _LIBCPP_INLINE_VISIBILITY 4805 result_type a() const {return __p_.a();} 4806 _LIBCPP_INLINE_VISIBILITY 4807 result_type b() const {return __p_.b();} 4808 4809 _LIBCPP_INLINE_VISIBILITY 4810 param_type param() const {return __p_;} 4811 _LIBCPP_INLINE_VISIBILITY 4812 void param(const param_type& __p) {__p_ = __p;} 4813 4814 _LIBCPP_INLINE_VISIBILITY 4815 result_type min() const {return 0;} 4816 _LIBCPP_INLINE_VISIBILITY 4817 result_type max() const {return numeric_limits<result_type>::infinity();} 4818 4819 friend _LIBCPP_INLINE_VISIBILITY 4820 bool operator==(const weibull_distribution& __x, 4821 const weibull_distribution& __y) 4822 {return __x.__p_ == __y.__p_;} 4823 friend _LIBCPP_INLINE_VISIBILITY 4824 bool operator!=(const weibull_distribution& __x, 4825 const weibull_distribution& __y) 4826 {return !(__x == __y);} 4827}; 4828 4829template <class _CharT, class _Traits, class _RT> 4830basic_ostream<_CharT, _Traits>& 4831operator<<(basic_ostream<_CharT, _Traits>& __os, 4832 const weibull_distribution<_RT>& __x) 4833{ 4834 __save_flags<_CharT, _Traits> __lx(__os); 4835 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 4836 ios_base::scientific); 4837 _CharT __sp = __os.widen(' '); 4838 __os.fill(__sp); 4839 __os << __x.a() << __sp << __x.b(); 4840 return __os; 4841} 4842 4843template <class _CharT, class _Traits, class _RT> 4844basic_istream<_CharT, _Traits>& 4845operator>>(basic_istream<_CharT, _Traits>& __is, 4846 weibull_distribution<_RT>& __x) 4847{ 4848 typedef weibull_distribution<_RT> _Eng; 4849 typedef typename _Eng::result_type result_type; 4850 typedef typename _Eng::param_type param_type; 4851 __save_flags<_CharT, _Traits> __lx(__is); 4852 __is.flags(ios_base::dec | ios_base::skipws); 4853 result_type __a; 4854 result_type __b; 4855 __is >> __a >> __b; 4856 if (!__is.fail()) 4857 __x.param(param_type(__a, __b)); 4858 return __is; 4859} 4860 4861template<class _RealType = double> 4862class _LIBCPP_TEMPLATE_VIS extreme_value_distribution 4863{ 4864public: 4865 // types 4866 typedef _RealType result_type; 4867 4868 class _LIBCPP_TEMPLATE_VIS param_type 4869 { 4870 result_type __a_; 4871 result_type __b_; 4872 public: 4873 typedef extreme_value_distribution distribution_type; 4874 4875 _LIBCPP_INLINE_VISIBILITY 4876 explicit param_type(result_type __a = 0, result_type __b = 1) 4877 : __a_(__a), __b_(__b) {} 4878 4879 _LIBCPP_INLINE_VISIBILITY 4880 result_type a() const {return __a_;} 4881 _LIBCPP_INLINE_VISIBILITY 4882 result_type b() const {return __b_;} 4883 4884 friend _LIBCPP_INLINE_VISIBILITY 4885 bool operator==(const param_type& __x, const param_type& __y) 4886 {return __x.__a_ == __y.__a_ && __x.__b_ == __y.__b_;} 4887 friend _LIBCPP_INLINE_VISIBILITY 4888 bool operator!=(const param_type& __x, const param_type& __y) 4889 {return !(__x == __y);} 4890 }; 4891 4892private: 4893 param_type __p_; 4894 4895public: 4896 // constructor and reset functions 4897 _LIBCPP_INLINE_VISIBILITY 4898 explicit extreme_value_distribution(result_type __a = 0, result_type __b = 1) 4899 : __p_(param_type(__a, __b)) {} 4900 _LIBCPP_INLINE_VISIBILITY 4901 explicit extreme_value_distribution(const param_type& __p) 4902 : __p_(__p) {} 4903 _LIBCPP_INLINE_VISIBILITY 4904 void reset() {} 4905 4906 // generating functions 4907 template<class _URNG> 4908 _LIBCPP_INLINE_VISIBILITY 4909 result_type operator()(_URNG& __g) 4910 {return (*this)(__g, __p_);} 4911 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 4912 4913 // property functions 4914 _LIBCPP_INLINE_VISIBILITY 4915 result_type a() const {return __p_.a();} 4916 _LIBCPP_INLINE_VISIBILITY 4917 result_type b() const {return __p_.b();} 4918 4919 _LIBCPP_INLINE_VISIBILITY 4920 param_type param() const {return __p_;} 4921 _LIBCPP_INLINE_VISIBILITY 4922 void param(const param_type& __p) {__p_ = __p;} 4923 4924 _LIBCPP_INLINE_VISIBILITY 4925 result_type min() const {return -numeric_limits<result_type>::infinity();} 4926 _LIBCPP_INLINE_VISIBILITY 4927 result_type max() const {return numeric_limits<result_type>::infinity();} 4928 4929 friend _LIBCPP_INLINE_VISIBILITY 4930 bool operator==(const extreme_value_distribution& __x, 4931 const extreme_value_distribution& __y) 4932 {return __x.__p_ == __y.__p_;} 4933 friend _LIBCPP_INLINE_VISIBILITY 4934 bool operator!=(const extreme_value_distribution& __x, 4935 const extreme_value_distribution& __y) 4936 {return !(__x == __y);} 4937}; 4938 4939template<class _RealType> 4940template<class _URNG> 4941_RealType 4942extreme_value_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p) 4943{ 4944 return __p.a() - __p.b() * 4945 _VSTD::log(-_VSTD::log(1-uniform_real_distribution<result_type>()(__g))); 4946} 4947 4948template <class _CharT, class _Traits, class _RT> 4949basic_ostream<_CharT, _Traits>& 4950operator<<(basic_ostream<_CharT, _Traits>& __os, 4951 const extreme_value_distribution<_RT>& __x) 4952{ 4953 __save_flags<_CharT, _Traits> __lx(__os); 4954 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 4955 ios_base::scientific); 4956 _CharT __sp = __os.widen(' '); 4957 __os.fill(__sp); 4958 __os << __x.a() << __sp << __x.b(); 4959 return __os; 4960} 4961 4962template <class _CharT, class _Traits, class _RT> 4963basic_istream<_CharT, _Traits>& 4964operator>>(basic_istream<_CharT, _Traits>& __is, 4965 extreme_value_distribution<_RT>& __x) 4966{ 4967 typedef extreme_value_distribution<_RT> _Eng; 4968 typedef typename _Eng::result_type result_type; 4969 typedef typename _Eng::param_type param_type; 4970 __save_flags<_CharT, _Traits> __lx(__is); 4971 __is.flags(ios_base::dec | ios_base::skipws); 4972 result_type __a; 4973 result_type __b; 4974 __is >> __a >> __b; 4975 if (!__is.fail()) 4976 __x.param(param_type(__a, __b)); 4977 return __is; 4978} 4979 4980// gamma_distribution 4981 4982template<class _RealType = double> 4983class _LIBCPP_TEMPLATE_VIS gamma_distribution 4984{ 4985public: 4986 // types 4987 typedef _RealType result_type; 4988 4989 class _LIBCPP_TEMPLATE_VIS param_type 4990 { 4991 result_type __alpha_; 4992 result_type __beta_; 4993 public: 4994 typedef gamma_distribution distribution_type; 4995 4996 _LIBCPP_INLINE_VISIBILITY 4997 explicit param_type(result_type __alpha = 1, result_type __beta = 1) 4998 : __alpha_(__alpha), __beta_(__beta) {} 4999 5000 _LIBCPP_INLINE_VISIBILITY 5001 result_type alpha() const {return __alpha_;} 5002 _LIBCPP_INLINE_VISIBILITY 5003 result_type beta() const {return __beta_;} 5004 5005 friend _LIBCPP_INLINE_VISIBILITY 5006 bool operator==(const param_type& __x, const param_type& __y) 5007 {return __x.__alpha_ == __y.__alpha_ && __x.__beta_ == __y.__beta_;} 5008 friend _LIBCPP_INLINE_VISIBILITY 5009 bool operator!=(const param_type& __x, const param_type& __y) 5010 {return !(__x == __y);} 5011 }; 5012 5013private: 5014 param_type __p_; 5015 5016public: 5017 // constructors and reset functions 5018 _LIBCPP_INLINE_VISIBILITY 5019 explicit gamma_distribution(result_type __alpha = 1, result_type __beta = 1) 5020 : __p_(param_type(__alpha, __beta)) {} 5021 _LIBCPP_INLINE_VISIBILITY 5022 explicit gamma_distribution(const param_type& __p) 5023 : __p_(__p) {} 5024 _LIBCPP_INLINE_VISIBILITY 5025 void reset() {} 5026 5027 // generating functions 5028 template<class _URNG> 5029 _LIBCPP_INLINE_VISIBILITY 5030 result_type operator()(_URNG& __g) 5031 {return (*this)(__g, __p_);} 5032 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 5033 5034 // property functions 5035 _LIBCPP_INLINE_VISIBILITY 5036 result_type alpha() const {return __p_.alpha();} 5037 _LIBCPP_INLINE_VISIBILITY 5038 result_type beta() const {return __p_.beta();} 5039 5040 _LIBCPP_INLINE_VISIBILITY 5041 param_type param() const {return __p_;} 5042 _LIBCPP_INLINE_VISIBILITY 5043 void param(const param_type& __p) {__p_ = __p;} 5044 5045 _LIBCPP_INLINE_VISIBILITY 5046 result_type min() const {return 0;} 5047 _LIBCPP_INLINE_VISIBILITY 5048 result_type max() const {return numeric_limits<result_type>::infinity();} 5049 5050 friend _LIBCPP_INLINE_VISIBILITY 5051 bool operator==(const gamma_distribution& __x, 5052 const gamma_distribution& __y) 5053 {return __x.__p_ == __y.__p_;} 5054 friend _LIBCPP_INLINE_VISIBILITY 5055 bool operator!=(const gamma_distribution& __x, 5056 const gamma_distribution& __y) 5057 {return !(__x == __y);} 5058}; 5059 5060template <class _RealType> 5061template<class _URNG> 5062_RealType 5063gamma_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p) 5064{ 5065 result_type __a = __p.alpha(); 5066 uniform_real_distribution<result_type> __gen(0, 1); 5067 exponential_distribution<result_type> __egen; 5068 result_type __x; 5069 if (__a == 1) 5070 __x = __egen(__g); 5071 else if (__a > 1) 5072 { 5073 const result_type __b = __a - 1; 5074 const result_type __c = 3 * __a - result_type(0.75); 5075 while (true) 5076 { 5077 const result_type __u = __gen(__g); 5078 const result_type __v = __gen(__g); 5079 const result_type __w = __u * (1 - __u); 5080 if (__w != 0) 5081 { 5082 const result_type __y = _VSTD::sqrt(__c / __w) * 5083 (__u - result_type(0.5)); 5084 __x = __b + __y; 5085 if (__x >= 0) 5086 { 5087 const result_type __z = 64 * __w * __w * __w * __v * __v; 5088 if (__z <= 1 - 2 * __y * __y / __x) 5089 break; 5090 if (_VSTD::log(__z) <= 2 * (__b * _VSTD::log(__x / __b) - __y)) 5091 break; 5092 } 5093 } 5094 } 5095 } 5096 else // __a < 1 5097 { 5098 while (true) 5099 { 5100 const result_type __u = __gen(__g); 5101 const result_type __es = __egen(__g); 5102 if (__u <= 1 - __a) 5103 { 5104 __x = _VSTD::pow(__u, 1 / __a); 5105 if (__x <= __es) 5106 break; 5107 } 5108 else 5109 { 5110 const result_type __e = -_VSTD::log((1-__u)/__a); 5111 __x = _VSTD::pow(1 - __a + __a * __e, 1 / __a); 5112 if (__x <= __e + __es) 5113 break; 5114 } 5115 } 5116 } 5117 return __x * __p.beta(); 5118} 5119 5120template <class _CharT, class _Traits, class _RT> 5121basic_ostream<_CharT, _Traits>& 5122operator<<(basic_ostream<_CharT, _Traits>& __os, 5123 const gamma_distribution<_RT>& __x) 5124{ 5125 __save_flags<_CharT, _Traits> __lx(__os); 5126 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 5127 ios_base::scientific); 5128 _CharT __sp = __os.widen(' '); 5129 __os.fill(__sp); 5130 __os << __x.alpha() << __sp << __x.beta(); 5131 return __os; 5132} 5133 5134template <class _CharT, class _Traits, class _RT> 5135basic_istream<_CharT, _Traits>& 5136operator>>(basic_istream<_CharT, _Traits>& __is, 5137 gamma_distribution<_RT>& __x) 5138{ 5139 typedef gamma_distribution<_RT> _Eng; 5140 typedef typename _Eng::result_type result_type; 5141 typedef typename _Eng::param_type param_type; 5142 __save_flags<_CharT, _Traits> __lx(__is); 5143 __is.flags(ios_base::dec | ios_base::skipws); 5144 result_type __alpha; 5145 result_type __beta; 5146 __is >> __alpha >> __beta; 5147 if (!__is.fail()) 5148 __x.param(param_type(__alpha, __beta)); 5149 return __is; 5150} 5151 5152// negative_binomial_distribution 5153 5154template<class _IntType = int> 5155class _LIBCPP_TEMPLATE_VIS negative_binomial_distribution 5156{ 5157public: 5158 // types 5159 typedef _IntType result_type; 5160 5161 class _LIBCPP_TEMPLATE_VIS param_type 5162 { 5163 result_type __k_; 5164 double __p_; 5165 public: 5166 typedef negative_binomial_distribution distribution_type; 5167 5168 _LIBCPP_INLINE_VISIBILITY 5169 explicit param_type(result_type __k = 1, double __p = 0.5) 5170 : __k_(__k), __p_(__p) {} 5171 5172 _LIBCPP_INLINE_VISIBILITY 5173 result_type k() const {return __k_;} 5174 _LIBCPP_INLINE_VISIBILITY 5175 double p() const {return __p_;} 5176 5177 friend _LIBCPP_INLINE_VISIBILITY 5178 bool operator==(const param_type& __x, const param_type& __y) 5179 {return __x.__k_ == __y.__k_ && __x.__p_ == __y.__p_;} 5180 friend _LIBCPP_INLINE_VISIBILITY 5181 bool operator!=(const param_type& __x, const param_type& __y) 5182 {return !(__x == __y);} 5183 }; 5184 5185private: 5186 param_type __p_; 5187 5188public: 5189 // constructor and reset functions 5190 _LIBCPP_INLINE_VISIBILITY 5191 explicit negative_binomial_distribution(result_type __k = 1, double __p = 0.5) 5192 : __p_(__k, __p) {} 5193 _LIBCPP_INLINE_VISIBILITY 5194 explicit negative_binomial_distribution(const param_type& __p) : __p_(__p) {} 5195 _LIBCPP_INLINE_VISIBILITY 5196 void reset() {} 5197 5198 // generating functions 5199 template<class _URNG> 5200 _LIBCPP_INLINE_VISIBILITY 5201 result_type operator()(_URNG& __g) 5202 {return (*this)(__g, __p_);} 5203 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 5204 5205 // property functions 5206 _LIBCPP_INLINE_VISIBILITY 5207 result_type k() const {return __p_.k();} 5208 _LIBCPP_INLINE_VISIBILITY 5209 double p() const {return __p_.p();} 5210 5211 _LIBCPP_INLINE_VISIBILITY 5212 param_type param() const {return __p_;} 5213 _LIBCPP_INLINE_VISIBILITY 5214 void param(const param_type& __p) {__p_ = __p;} 5215 5216 _LIBCPP_INLINE_VISIBILITY 5217 result_type min() const {return 0;} 5218 _LIBCPP_INLINE_VISIBILITY 5219 result_type max() const {return numeric_limits<result_type>::max();} 5220 5221 friend _LIBCPP_INLINE_VISIBILITY 5222 bool operator==(const negative_binomial_distribution& __x, 5223 const negative_binomial_distribution& __y) 5224 {return __x.__p_ == __y.__p_;} 5225 friend _LIBCPP_INLINE_VISIBILITY 5226 bool operator!=(const negative_binomial_distribution& __x, 5227 const negative_binomial_distribution& __y) 5228 {return !(__x == __y);} 5229}; 5230 5231template <class _IntType> 5232template<class _URNG> 5233_IntType 5234negative_binomial_distribution<_IntType>::operator()(_URNG& __urng, const param_type& __pr) 5235{ 5236 result_type __k = __pr.k(); 5237 double __p = __pr.p(); 5238 if (__k <= 21 * __p) 5239 { 5240 bernoulli_distribution __gen(__p); 5241 result_type __f = 0; 5242 result_type __s = 0; 5243 while (__s < __k) 5244 { 5245 if (__gen(__urng)) 5246 ++__s; 5247 else 5248 ++__f; 5249 } 5250 return __f; 5251 } 5252 return poisson_distribution<result_type>(gamma_distribution<double> 5253 (__k, (1-__p)/__p)(__urng))(__urng); 5254} 5255 5256template <class _CharT, class _Traits, class _IntType> 5257basic_ostream<_CharT, _Traits>& 5258operator<<(basic_ostream<_CharT, _Traits>& __os, 5259 const negative_binomial_distribution<_IntType>& __x) 5260{ 5261 __save_flags<_CharT, _Traits> __lx(__os); 5262 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 5263 ios_base::scientific); 5264 _CharT __sp = __os.widen(' '); 5265 __os.fill(__sp); 5266 return __os << __x.k() << __sp << __x.p(); 5267} 5268 5269template <class _CharT, class _Traits, class _IntType> 5270basic_istream<_CharT, _Traits>& 5271operator>>(basic_istream<_CharT, _Traits>& __is, 5272 negative_binomial_distribution<_IntType>& __x) 5273{ 5274 typedef negative_binomial_distribution<_IntType> _Eng; 5275 typedef typename _Eng::result_type result_type; 5276 typedef typename _Eng::param_type param_type; 5277 __save_flags<_CharT, _Traits> __lx(__is); 5278 __is.flags(ios_base::dec | ios_base::skipws); 5279 result_type __k; 5280 double __p; 5281 __is >> __k >> __p; 5282 if (!__is.fail()) 5283 __x.param(param_type(__k, __p)); 5284 return __is; 5285} 5286 5287// geometric_distribution 5288 5289template<class _IntType = int> 5290class _LIBCPP_TEMPLATE_VIS geometric_distribution 5291{ 5292public: 5293 // types 5294 typedef _IntType result_type; 5295 5296 class _LIBCPP_TEMPLATE_VIS param_type 5297 { 5298 double __p_; 5299 public: 5300 typedef geometric_distribution distribution_type; 5301 5302 _LIBCPP_INLINE_VISIBILITY 5303 explicit param_type(double __p = 0.5) : __p_(__p) {} 5304 5305 _LIBCPP_INLINE_VISIBILITY 5306 double p() const {return __p_;} 5307 5308 friend _LIBCPP_INLINE_VISIBILITY 5309 bool operator==(const param_type& __x, const param_type& __y) 5310 {return __x.__p_ == __y.__p_;} 5311 friend _LIBCPP_INLINE_VISIBILITY 5312 bool operator!=(const param_type& __x, const param_type& __y) 5313 {return !(__x == __y);} 5314 }; 5315 5316private: 5317 param_type __p_; 5318 5319public: 5320 // constructors and reset functions 5321 _LIBCPP_INLINE_VISIBILITY 5322 explicit geometric_distribution(double __p = 0.5) : __p_(__p) {} 5323 _LIBCPP_INLINE_VISIBILITY 5324 explicit geometric_distribution(const param_type& __p) : __p_(__p) {} 5325 _LIBCPP_INLINE_VISIBILITY 5326 void reset() {} 5327 5328 // generating functions 5329 template<class _URNG> 5330 _LIBCPP_INLINE_VISIBILITY 5331 result_type operator()(_URNG& __g) 5332 {return (*this)(__g, __p_);} 5333 template<class _URNG> 5334 _LIBCPP_INLINE_VISIBILITY 5335 result_type operator()(_URNG& __g, const param_type& __p) 5336 {return negative_binomial_distribution<result_type>(1, __p.p())(__g);} 5337 5338 // property functions 5339 _LIBCPP_INLINE_VISIBILITY 5340 double p() const {return __p_.p();} 5341 5342 _LIBCPP_INLINE_VISIBILITY 5343 param_type param() const {return __p_;} 5344 _LIBCPP_INLINE_VISIBILITY 5345 void param(const param_type& __p) {__p_ = __p;} 5346 5347 _LIBCPP_INLINE_VISIBILITY 5348 result_type min() const {return 0;} 5349 _LIBCPP_INLINE_VISIBILITY 5350 result_type max() const {return numeric_limits<result_type>::max();} 5351 5352 friend _LIBCPP_INLINE_VISIBILITY 5353 bool operator==(const geometric_distribution& __x, 5354 const geometric_distribution& __y) 5355 {return __x.__p_ == __y.__p_;} 5356 friend _LIBCPP_INLINE_VISIBILITY 5357 bool operator!=(const geometric_distribution& __x, 5358 const geometric_distribution& __y) 5359 {return !(__x == __y);} 5360}; 5361 5362template <class _CharT, class _Traits, class _IntType> 5363basic_ostream<_CharT, _Traits>& 5364operator<<(basic_ostream<_CharT, _Traits>& __os, 5365 const geometric_distribution<_IntType>& __x) 5366{ 5367 __save_flags<_CharT, _Traits> __lx(__os); 5368 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 5369 ios_base::scientific); 5370 return __os << __x.p(); 5371} 5372 5373template <class _CharT, class _Traits, class _IntType> 5374basic_istream<_CharT, _Traits>& 5375operator>>(basic_istream<_CharT, _Traits>& __is, 5376 geometric_distribution<_IntType>& __x) 5377{ 5378 typedef geometric_distribution<_IntType> _Eng; 5379 typedef typename _Eng::param_type param_type; 5380 __save_flags<_CharT, _Traits> __lx(__is); 5381 __is.flags(ios_base::dec | ios_base::skipws); 5382 double __p; 5383 __is >> __p; 5384 if (!__is.fail()) 5385 __x.param(param_type(__p)); 5386 return __is; 5387} 5388 5389// chi_squared_distribution 5390 5391template<class _RealType = double> 5392class _LIBCPP_TEMPLATE_VIS chi_squared_distribution 5393{ 5394public: 5395 // types 5396 typedef _RealType result_type; 5397 5398 class _LIBCPP_TEMPLATE_VIS param_type 5399 { 5400 result_type __n_; 5401 public: 5402 typedef chi_squared_distribution distribution_type; 5403 5404 _LIBCPP_INLINE_VISIBILITY 5405 explicit param_type(result_type __n = 1) : __n_(__n) {} 5406 5407 _LIBCPP_INLINE_VISIBILITY 5408 result_type n() const {return __n_;} 5409 5410 friend _LIBCPP_INLINE_VISIBILITY 5411 bool operator==(const param_type& __x, const param_type& __y) 5412 {return __x.__n_ == __y.__n_;} 5413 friend _LIBCPP_INLINE_VISIBILITY 5414 bool operator!=(const param_type& __x, const param_type& __y) 5415 {return !(__x == __y);} 5416 }; 5417 5418private: 5419 param_type __p_; 5420 5421public: 5422 // constructor and reset functions 5423 _LIBCPP_INLINE_VISIBILITY 5424 explicit chi_squared_distribution(result_type __n = 1) 5425 : __p_(param_type(__n)) {} 5426 _LIBCPP_INLINE_VISIBILITY 5427 explicit chi_squared_distribution(const param_type& __p) 5428 : __p_(__p) {} 5429 _LIBCPP_INLINE_VISIBILITY 5430 void reset() {} 5431 5432 // generating functions 5433 template<class _URNG> 5434 _LIBCPP_INLINE_VISIBILITY 5435 result_type operator()(_URNG& __g) 5436 {return (*this)(__g, __p_);} 5437 template<class _URNG> 5438 _LIBCPP_INLINE_VISIBILITY 5439 result_type operator()(_URNG& __g, const param_type& __p) 5440 {return gamma_distribution<result_type>(__p.n() / 2, 2)(__g);} 5441 5442 // property functions 5443 _LIBCPP_INLINE_VISIBILITY 5444 result_type n() const {return __p_.n();} 5445 5446 _LIBCPP_INLINE_VISIBILITY 5447 param_type param() const {return __p_;} 5448 _LIBCPP_INLINE_VISIBILITY 5449 void param(const param_type& __p) {__p_ = __p;} 5450 5451 _LIBCPP_INLINE_VISIBILITY 5452 result_type min() const {return 0;} 5453 _LIBCPP_INLINE_VISIBILITY 5454 result_type max() const {return numeric_limits<result_type>::infinity();} 5455 5456 friend _LIBCPP_INLINE_VISIBILITY 5457 bool operator==(const chi_squared_distribution& __x, 5458 const chi_squared_distribution& __y) 5459 {return __x.__p_ == __y.__p_;} 5460 friend _LIBCPP_INLINE_VISIBILITY 5461 bool operator!=(const chi_squared_distribution& __x, 5462 const chi_squared_distribution& __y) 5463 {return !(__x == __y);} 5464}; 5465 5466template <class _CharT, class _Traits, class _RT> 5467basic_ostream<_CharT, _Traits>& 5468operator<<(basic_ostream<_CharT, _Traits>& __os, 5469 const chi_squared_distribution<_RT>& __x) 5470{ 5471 __save_flags<_CharT, _Traits> __lx(__os); 5472 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 5473 ios_base::scientific); 5474 __os << __x.n(); 5475 return __os; 5476} 5477 5478template <class _CharT, class _Traits, class _RT> 5479basic_istream<_CharT, _Traits>& 5480operator>>(basic_istream<_CharT, _Traits>& __is, 5481 chi_squared_distribution<_RT>& __x) 5482{ 5483 typedef chi_squared_distribution<_RT> _Eng; 5484 typedef typename _Eng::result_type result_type; 5485 typedef typename _Eng::param_type param_type; 5486 __save_flags<_CharT, _Traits> __lx(__is); 5487 __is.flags(ios_base::dec | ios_base::skipws); 5488 result_type __n; 5489 __is >> __n; 5490 if (!__is.fail()) 5491 __x.param(param_type(__n)); 5492 return __is; 5493} 5494 5495// cauchy_distribution 5496 5497template<class _RealType = double> 5498class _LIBCPP_TEMPLATE_VIS cauchy_distribution 5499{ 5500public: 5501 // types 5502 typedef _RealType result_type; 5503 5504 class _LIBCPP_TEMPLATE_VIS param_type 5505 { 5506 result_type __a_; 5507 result_type __b_; 5508 public: 5509 typedef cauchy_distribution distribution_type; 5510 5511 _LIBCPP_INLINE_VISIBILITY 5512 explicit param_type(result_type __a = 0, result_type __b = 1) 5513 : __a_(__a), __b_(__b) {} 5514 5515 _LIBCPP_INLINE_VISIBILITY 5516 result_type a() const {return __a_;} 5517 _LIBCPP_INLINE_VISIBILITY 5518 result_type b() const {return __b_;} 5519 5520 friend _LIBCPP_INLINE_VISIBILITY 5521 bool operator==(const param_type& __x, const param_type& __y) 5522 {return __x.__a_ == __y.__a_ && __x.__b_ == __y.__b_;} 5523 friend _LIBCPP_INLINE_VISIBILITY 5524 bool operator!=(const param_type& __x, const param_type& __y) 5525 {return !(__x == __y);} 5526 }; 5527 5528private: 5529 param_type __p_; 5530 5531public: 5532 // constructor and reset functions 5533 _LIBCPP_INLINE_VISIBILITY 5534 explicit cauchy_distribution(result_type __a = 0, result_type __b = 1) 5535 : __p_(param_type(__a, __b)) {} 5536 _LIBCPP_INLINE_VISIBILITY 5537 explicit cauchy_distribution(const param_type& __p) 5538 : __p_(__p) {} 5539 _LIBCPP_INLINE_VISIBILITY 5540 void reset() {} 5541 5542 // generating functions 5543 template<class _URNG> 5544 _LIBCPP_INLINE_VISIBILITY 5545 result_type operator()(_URNG& __g) 5546 {return (*this)(__g, __p_);} 5547 template<class _URNG> _LIBCPP_INLINE_VISIBILITY result_type operator()(_URNG& __g, const param_type& __p); 5548 5549 // property functions 5550 _LIBCPP_INLINE_VISIBILITY 5551 result_type a() const {return __p_.a();} 5552 _LIBCPP_INLINE_VISIBILITY 5553 result_type b() const {return __p_.b();} 5554 5555 _LIBCPP_INLINE_VISIBILITY 5556 param_type param() const {return __p_;} 5557 _LIBCPP_INLINE_VISIBILITY 5558 void param(const param_type& __p) {__p_ = __p;} 5559 5560 _LIBCPP_INLINE_VISIBILITY 5561 result_type min() const {return -numeric_limits<result_type>::infinity();} 5562 _LIBCPP_INLINE_VISIBILITY 5563 result_type max() const {return numeric_limits<result_type>::infinity();} 5564 5565 friend _LIBCPP_INLINE_VISIBILITY 5566 bool operator==(const cauchy_distribution& __x, 5567 const cauchy_distribution& __y) 5568 {return __x.__p_ == __y.__p_;} 5569 friend _LIBCPP_INLINE_VISIBILITY 5570 bool operator!=(const cauchy_distribution& __x, 5571 const cauchy_distribution& __y) 5572 {return !(__x == __y);} 5573}; 5574 5575template <class _RealType> 5576template<class _URNG> 5577inline 5578_RealType 5579cauchy_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p) 5580{ 5581 uniform_real_distribution<result_type> __gen; 5582 // purposefully let tan arg get as close to pi/2 as it wants, tan will return a finite 5583 return __p.a() + __p.b() * _VSTD::tan(3.1415926535897932384626433832795 * __gen(__g)); 5584} 5585 5586template <class _CharT, class _Traits, class _RT> 5587basic_ostream<_CharT, _Traits>& 5588operator<<(basic_ostream<_CharT, _Traits>& __os, 5589 const cauchy_distribution<_RT>& __x) 5590{ 5591 __save_flags<_CharT, _Traits> __lx(__os); 5592 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 5593 ios_base::scientific); 5594 _CharT __sp = __os.widen(' '); 5595 __os.fill(__sp); 5596 __os << __x.a() << __sp << __x.b(); 5597 return __os; 5598} 5599 5600template <class _CharT, class _Traits, class _RT> 5601basic_istream<_CharT, _Traits>& 5602operator>>(basic_istream<_CharT, _Traits>& __is, 5603 cauchy_distribution<_RT>& __x) 5604{ 5605 typedef cauchy_distribution<_RT> _Eng; 5606 typedef typename _Eng::result_type result_type; 5607 typedef typename _Eng::param_type param_type; 5608 __save_flags<_CharT, _Traits> __lx(__is); 5609 __is.flags(ios_base::dec | ios_base::skipws); 5610 result_type __a; 5611 result_type __b; 5612 __is >> __a >> __b; 5613 if (!__is.fail()) 5614 __x.param(param_type(__a, __b)); 5615 return __is; 5616} 5617 5618// fisher_f_distribution 5619 5620template<class _RealType = double> 5621class _LIBCPP_TEMPLATE_VIS fisher_f_distribution 5622{ 5623public: 5624 // types 5625 typedef _RealType result_type; 5626 5627 class _LIBCPP_TEMPLATE_VIS param_type 5628 { 5629 result_type __m_; 5630 result_type __n_; 5631 public: 5632 typedef fisher_f_distribution distribution_type; 5633 5634 _LIBCPP_INLINE_VISIBILITY 5635 explicit param_type(result_type __m = 1, result_type __n = 1) 5636 : __m_(__m), __n_(__n) {} 5637 5638 _LIBCPP_INLINE_VISIBILITY 5639 result_type m() const {return __m_;} 5640 _LIBCPP_INLINE_VISIBILITY 5641 result_type n() const {return __n_;} 5642 5643 friend _LIBCPP_INLINE_VISIBILITY 5644 bool operator==(const param_type& __x, const param_type& __y) 5645 {return __x.__m_ == __y.__m_ && __x.__n_ == __y.__n_;} 5646 friend _LIBCPP_INLINE_VISIBILITY 5647 bool operator!=(const param_type& __x, const param_type& __y) 5648 {return !(__x == __y);} 5649 }; 5650 5651private: 5652 param_type __p_; 5653 5654public: 5655 // constructor and reset functions 5656 _LIBCPP_INLINE_VISIBILITY 5657 explicit fisher_f_distribution(result_type __m = 1, result_type __n = 1) 5658 : __p_(param_type(__m, __n)) {} 5659 _LIBCPP_INLINE_VISIBILITY 5660 explicit fisher_f_distribution(const param_type& __p) 5661 : __p_(__p) {} 5662 _LIBCPP_INLINE_VISIBILITY 5663 void reset() {} 5664 5665 // generating functions 5666 template<class _URNG> 5667 _LIBCPP_INLINE_VISIBILITY 5668 result_type operator()(_URNG& __g) 5669 {return (*this)(__g, __p_);} 5670 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 5671 5672 // property functions 5673 _LIBCPP_INLINE_VISIBILITY 5674 result_type m() const {return __p_.m();} 5675 _LIBCPP_INLINE_VISIBILITY 5676 result_type n() const {return __p_.n();} 5677 5678 _LIBCPP_INLINE_VISIBILITY 5679 param_type param() const {return __p_;} 5680 _LIBCPP_INLINE_VISIBILITY 5681 void param(const param_type& __p) {__p_ = __p;} 5682 5683 _LIBCPP_INLINE_VISIBILITY 5684 result_type min() const {return 0;} 5685 _LIBCPP_INLINE_VISIBILITY 5686 result_type max() const {return numeric_limits<result_type>::infinity();} 5687 5688 friend _LIBCPP_INLINE_VISIBILITY 5689 bool operator==(const fisher_f_distribution& __x, 5690 const fisher_f_distribution& __y) 5691 {return __x.__p_ == __y.__p_;} 5692 friend _LIBCPP_INLINE_VISIBILITY 5693 bool operator!=(const fisher_f_distribution& __x, 5694 const fisher_f_distribution& __y) 5695 {return !(__x == __y);} 5696}; 5697 5698template <class _RealType> 5699template<class _URNG> 5700_RealType 5701fisher_f_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p) 5702{ 5703 gamma_distribution<result_type> __gdm(__p.m() * result_type(.5)); 5704 gamma_distribution<result_type> __gdn(__p.n() * result_type(.5)); 5705 return __p.n() * __gdm(__g) / (__p.m() * __gdn(__g)); 5706} 5707 5708template <class _CharT, class _Traits, class _RT> 5709basic_ostream<_CharT, _Traits>& 5710operator<<(basic_ostream<_CharT, _Traits>& __os, 5711 const fisher_f_distribution<_RT>& __x) 5712{ 5713 __save_flags<_CharT, _Traits> __lx(__os); 5714 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 5715 ios_base::scientific); 5716 _CharT __sp = __os.widen(' '); 5717 __os.fill(__sp); 5718 __os << __x.m() << __sp << __x.n(); 5719 return __os; 5720} 5721 5722template <class _CharT, class _Traits, class _RT> 5723basic_istream<_CharT, _Traits>& 5724operator>>(basic_istream<_CharT, _Traits>& __is, 5725 fisher_f_distribution<_RT>& __x) 5726{ 5727 typedef fisher_f_distribution<_RT> _Eng; 5728 typedef typename _Eng::result_type result_type; 5729 typedef typename _Eng::param_type param_type; 5730 __save_flags<_CharT, _Traits> __lx(__is); 5731 __is.flags(ios_base::dec | ios_base::skipws); 5732 result_type __m; 5733 result_type __n; 5734 __is >> __m >> __n; 5735 if (!__is.fail()) 5736 __x.param(param_type(__m, __n)); 5737 return __is; 5738} 5739 5740// student_t_distribution 5741 5742template<class _RealType = double> 5743class _LIBCPP_TEMPLATE_VIS student_t_distribution 5744{ 5745public: 5746 // types 5747 typedef _RealType result_type; 5748 5749 class _LIBCPP_TEMPLATE_VIS param_type 5750 { 5751 result_type __n_; 5752 public: 5753 typedef student_t_distribution distribution_type; 5754 5755 _LIBCPP_INLINE_VISIBILITY 5756 explicit param_type(result_type __n = 1) : __n_(__n) {} 5757 5758 _LIBCPP_INLINE_VISIBILITY 5759 result_type n() const {return __n_;} 5760 5761 friend _LIBCPP_INLINE_VISIBILITY 5762 bool operator==(const param_type& __x, const param_type& __y) 5763 {return __x.__n_ == __y.__n_;} 5764 friend _LIBCPP_INLINE_VISIBILITY 5765 bool operator!=(const param_type& __x, const param_type& __y) 5766 {return !(__x == __y);} 5767 }; 5768 5769private: 5770 param_type __p_; 5771 normal_distribution<result_type> __nd_; 5772 5773public: 5774 // constructor and reset functions 5775 _LIBCPP_INLINE_VISIBILITY 5776 explicit student_t_distribution(result_type __n = 1) 5777 : __p_(param_type(__n)) {} 5778 _LIBCPP_INLINE_VISIBILITY 5779 explicit student_t_distribution(const param_type& __p) 5780 : __p_(__p) {} 5781 _LIBCPP_INLINE_VISIBILITY 5782 void reset() {__nd_.reset();} 5783 5784 // generating functions 5785 template<class _URNG> 5786 _LIBCPP_INLINE_VISIBILITY 5787 result_type operator()(_URNG& __g) 5788 {return (*this)(__g, __p_);} 5789 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 5790 5791 // property functions 5792 _LIBCPP_INLINE_VISIBILITY 5793 result_type n() const {return __p_.n();} 5794 5795 _LIBCPP_INLINE_VISIBILITY 5796 param_type param() const {return __p_;} 5797 _LIBCPP_INLINE_VISIBILITY 5798 void param(const param_type& __p) {__p_ = __p;} 5799 5800 _LIBCPP_INLINE_VISIBILITY 5801 result_type min() const {return -numeric_limits<result_type>::infinity();} 5802 _LIBCPP_INLINE_VISIBILITY 5803 result_type max() const {return numeric_limits<result_type>::infinity();} 5804 5805 friend _LIBCPP_INLINE_VISIBILITY 5806 bool operator==(const student_t_distribution& __x, 5807 const student_t_distribution& __y) 5808 {return __x.__p_ == __y.__p_;} 5809 friend _LIBCPP_INLINE_VISIBILITY 5810 bool operator!=(const student_t_distribution& __x, 5811 const student_t_distribution& __y) 5812 {return !(__x == __y);} 5813}; 5814 5815template <class _RealType> 5816template<class _URNG> 5817_RealType 5818student_t_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p) 5819{ 5820 gamma_distribution<result_type> __gd(__p.n() * .5, 2); 5821 return __nd_(__g) * _VSTD::sqrt(__p.n()/__gd(__g)); 5822} 5823 5824template <class _CharT, class _Traits, class _RT> 5825basic_ostream<_CharT, _Traits>& 5826operator<<(basic_ostream<_CharT, _Traits>& __os, 5827 const student_t_distribution<_RT>& __x) 5828{ 5829 __save_flags<_CharT, _Traits> __lx(__os); 5830 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 5831 ios_base::scientific); 5832 __os << __x.n(); 5833 return __os; 5834} 5835 5836template <class _CharT, class _Traits, class _RT> 5837basic_istream<_CharT, _Traits>& 5838operator>>(basic_istream<_CharT, _Traits>& __is, 5839 student_t_distribution<_RT>& __x) 5840{ 5841 typedef student_t_distribution<_RT> _Eng; 5842 typedef typename _Eng::result_type result_type; 5843 typedef typename _Eng::param_type param_type; 5844 __save_flags<_CharT, _Traits> __lx(__is); 5845 __is.flags(ios_base::dec | ios_base::skipws); 5846 result_type __n; 5847 __is >> __n; 5848 if (!__is.fail()) 5849 __x.param(param_type(__n)); 5850 return __is; 5851} 5852 5853// discrete_distribution 5854 5855template<class _IntType = int> 5856class _LIBCPP_TEMPLATE_VIS discrete_distribution 5857{ 5858public: 5859 // types 5860 typedef _IntType result_type; 5861 5862 class _LIBCPP_TEMPLATE_VIS param_type 5863 { 5864 vector<double> __p_; 5865 public: 5866 typedef discrete_distribution distribution_type; 5867 5868 _LIBCPP_INLINE_VISIBILITY 5869 param_type() {} 5870 template<class _InputIterator> 5871 _LIBCPP_INLINE_VISIBILITY 5872 param_type(_InputIterator __f, _InputIterator __l) 5873 : __p_(__f, __l) {__init();} 5874#ifndef _LIBCPP_CXX03_LANG 5875 _LIBCPP_INLINE_VISIBILITY 5876 param_type(initializer_list<double> __wl) 5877 : __p_(__wl.begin(), __wl.end()) {__init();} 5878#endif // _LIBCPP_CXX03_LANG 5879 template<class _UnaryOperation> 5880 param_type(size_t __nw, double __xmin, double __xmax, 5881 _UnaryOperation __fw); 5882 5883 vector<double> probabilities() const; 5884 5885 friend _LIBCPP_INLINE_VISIBILITY 5886 bool operator==(const param_type& __x, const param_type& __y) 5887 {return __x.__p_ == __y.__p_;} 5888 friend _LIBCPP_INLINE_VISIBILITY 5889 bool operator!=(const param_type& __x, const param_type& __y) 5890 {return !(__x == __y);} 5891 5892 private: 5893 void __init(); 5894 5895 friend class discrete_distribution; 5896 5897 template <class _CharT, class _Traits, class _IT> 5898 friend 5899 basic_ostream<_CharT, _Traits>& 5900 operator<<(basic_ostream<_CharT, _Traits>& __os, 5901 const discrete_distribution<_IT>& __x); 5902 5903 template <class _CharT, class _Traits, class _IT> 5904 friend 5905 basic_istream<_CharT, _Traits>& 5906 operator>>(basic_istream<_CharT, _Traits>& __is, 5907 discrete_distribution<_IT>& __x); 5908 }; 5909 5910private: 5911 param_type __p_; 5912 5913public: 5914 // constructor and reset functions 5915 _LIBCPP_INLINE_VISIBILITY 5916 discrete_distribution() {} 5917 template<class _InputIterator> 5918 _LIBCPP_INLINE_VISIBILITY 5919 discrete_distribution(_InputIterator __f, _InputIterator __l) 5920 : __p_(__f, __l) {} 5921#ifndef _LIBCPP_CXX03_LANG 5922 _LIBCPP_INLINE_VISIBILITY 5923 discrete_distribution(initializer_list<double> __wl) 5924 : __p_(__wl) {} 5925#endif // _LIBCPP_CXX03_LANG 5926 template<class _UnaryOperation> 5927 _LIBCPP_INLINE_VISIBILITY 5928 discrete_distribution(size_t __nw, double __xmin, double __xmax, 5929 _UnaryOperation __fw) 5930 : __p_(__nw, __xmin, __xmax, __fw) {} 5931 _LIBCPP_INLINE_VISIBILITY 5932 explicit discrete_distribution(const param_type& __p) 5933 : __p_(__p) {} 5934 _LIBCPP_INLINE_VISIBILITY 5935 void reset() {} 5936 5937 // generating functions 5938 template<class _URNG> 5939 _LIBCPP_INLINE_VISIBILITY 5940 result_type operator()(_URNG& __g) 5941 {return (*this)(__g, __p_);} 5942 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 5943 5944 // property functions 5945 _LIBCPP_INLINE_VISIBILITY 5946 vector<double> probabilities() const {return __p_.probabilities();} 5947 5948 _LIBCPP_INLINE_VISIBILITY 5949 param_type param() const {return __p_;} 5950 _LIBCPP_INLINE_VISIBILITY 5951 void param(const param_type& __p) {__p_ = __p;} 5952 5953 _LIBCPP_INLINE_VISIBILITY 5954 result_type min() const {return 0;} 5955 _LIBCPP_INLINE_VISIBILITY 5956 result_type max() const {return __p_.__p_.size();} 5957 5958 friend _LIBCPP_INLINE_VISIBILITY 5959 bool operator==(const discrete_distribution& __x, 5960 const discrete_distribution& __y) 5961 {return __x.__p_ == __y.__p_;} 5962 friend _LIBCPP_INLINE_VISIBILITY 5963 bool operator!=(const discrete_distribution& __x, 5964 const discrete_distribution& __y) 5965 {return !(__x == __y);} 5966 5967 template <class _CharT, class _Traits, class _IT> 5968 friend 5969 basic_ostream<_CharT, _Traits>& 5970 operator<<(basic_ostream<_CharT, _Traits>& __os, 5971 const discrete_distribution<_IT>& __x); 5972 5973 template <class _CharT, class _Traits, class _IT> 5974 friend 5975 basic_istream<_CharT, _Traits>& 5976 operator>>(basic_istream<_CharT, _Traits>& __is, 5977 discrete_distribution<_IT>& __x); 5978}; 5979 5980template<class _IntType> 5981template<class _UnaryOperation> 5982discrete_distribution<_IntType>::param_type::param_type(size_t __nw, 5983 double __xmin, 5984 double __xmax, 5985 _UnaryOperation __fw) 5986{ 5987 if (__nw > 1) 5988 { 5989 __p_.reserve(__nw - 1); 5990 double __d = (__xmax - __xmin) / __nw; 5991 double __d2 = __d / 2; 5992 for (size_t __k = 0; __k < __nw; ++__k) 5993 __p_.push_back(__fw(__xmin + __k * __d + __d2)); 5994 __init(); 5995 } 5996} 5997 5998template<class _IntType> 5999void 6000discrete_distribution<_IntType>::param_type::__init() 6001{ 6002 if (!__p_.empty()) 6003 { 6004 if (__p_.size() > 1) 6005 { 6006 double __s = _VSTD::accumulate(__p_.begin(), __p_.end(), 0.0); 6007 for (_VSTD::vector<double>::iterator __i = __p_.begin(), __e = __p_.end(); 6008 __i < __e; ++__i) 6009 *__i /= __s; 6010 vector<double> __t(__p_.size() - 1); 6011 _VSTD::partial_sum(__p_.begin(), __p_.end() - 1, __t.begin()); 6012 swap(__p_, __t); 6013 } 6014 else 6015 { 6016 __p_.clear(); 6017 __p_.shrink_to_fit(); 6018 } 6019 } 6020} 6021 6022template<class _IntType> 6023vector<double> 6024discrete_distribution<_IntType>::param_type::probabilities() const 6025{ 6026 size_t __n = __p_.size(); 6027 _VSTD::vector<double> __p(__n+1); 6028 _VSTD::adjacent_difference(__p_.begin(), __p_.end(), __p.begin()); 6029 if (__n > 0) 6030 __p[__n] = 1 - __p_[__n-1]; 6031 else 6032 __p[0] = 1; 6033 return __p; 6034} 6035 6036template<class _IntType> 6037template<class _URNG> 6038_IntType 6039discrete_distribution<_IntType>::operator()(_URNG& __g, const param_type& __p) 6040{ 6041 uniform_real_distribution<double> __gen; 6042 return static_cast<_IntType>( 6043 _VSTD::upper_bound(__p.__p_.begin(), __p.__p_.end(), __gen(__g)) - 6044 __p.__p_.begin()); 6045} 6046 6047template <class _CharT, class _Traits, class _IT> 6048basic_ostream<_CharT, _Traits>& 6049operator<<(basic_ostream<_CharT, _Traits>& __os, 6050 const discrete_distribution<_IT>& __x) 6051{ 6052 __save_flags<_CharT, _Traits> __lx(__os); 6053 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 6054 ios_base::scientific); 6055 _CharT __sp = __os.widen(' '); 6056 __os.fill(__sp); 6057 size_t __n = __x.__p_.__p_.size(); 6058 __os << __n; 6059 for (size_t __i = 0; __i < __n; ++__i) 6060 __os << __sp << __x.__p_.__p_[__i]; 6061 return __os; 6062} 6063 6064template <class _CharT, class _Traits, class _IT> 6065basic_istream<_CharT, _Traits>& 6066operator>>(basic_istream<_CharT, _Traits>& __is, 6067 discrete_distribution<_IT>& __x) 6068{ 6069 __save_flags<_CharT, _Traits> __lx(__is); 6070 __is.flags(ios_base::dec | ios_base::skipws); 6071 size_t __n; 6072 __is >> __n; 6073 vector<double> __p(__n); 6074 for (size_t __i = 0; __i < __n; ++__i) 6075 __is >> __p[__i]; 6076 if (!__is.fail()) 6077 swap(__x.__p_.__p_, __p); 6078 return __is; 6079} 6080 6081// piecewise_constant_distribution 6082 6083template<class _RealType = double> 6084class _LIBCPP_TEMPLATE_VIS piecewise_constant_distribution 6085{ 6086public: 6087 // types 6088 typedef _RealType result_type; 6089 6090 class _LIBCPP_TEMPLATE_VIS param_type 6091 { 6092 vector<result_type> __b_; 6093 vector<result_type> __densities_; 6094 vector<result_type> __areas_; 6095 public: 6096 typedef piecewise_constant_distribution distribution_type; 6097 6098 param_type(); 6099 template<class _InputIteratorB, class _InputIteratorW> 6100 param_type(_InputIteratorB __fB, _InputIteratorB __lB, 6101 _InputIteratorW __fW); 6102#ifndef _LIBCPP_CXX03_LANG 6103 template<class _UnaryOperation> 6104 param_type(initializer_list<result_type> __bl, _UnaryOperation __fw); 6105#endif // _LIBCPP_CXX03_LANG 6106 template<class _UnaryOperation> 6107 param_type(size_t __nw, result_type __xmin, result_type __xmax, 6108 _UnaryOperation __fw); 6109 param_type & operator=(const param_type& __rhs); 6110 6111 _LIBCPP_INLINE_VISIBILITY 6112 vector<result_type> intervals() const {return __b_;} 6113 _LIBCPP_INLINE_VISIBILITY 6114 vector<result_type> densities() const {return __densities_;} 6115 6116 friend _LIBCPP_INLINE_VISIBILITY 6117 bool operator==(const param_type& __x, const param_type& __y) 6118 {return __x.__densities_ == __y.__densities_ && __x.__b_ == __y.__b_;} 6119 friend _LIBCPP_INLINE_VISIBILITY 6120 bool operator!=(const param_type& __x, const param_type& __y) 6121 {return !(__x == __y);} 6122 6123 private: 6124 void __init(); 6125 6126 friend class piecewise_constant_distribution; 6127 6128 template <class _CharT, class _Traits, class _RT> 6129 friend 6130 basic_ostream<_CharT, _Traits>& 6131 operator<<(basic_ostream<_CharT, _Traits>& __os, 6132 const piecewise_constant_distribution<_RT>& __x); 6133 6134 template <class _CharT, class _Traits, class _RT> 6135 friend 6136 basic_istream<_CharT, _Traits>& 6137 operator>>(basic_istream<_CharT, _Traits>& __is, 6138 piecewise_constant_distribution<_RT>& __x); 6139 }; 6140 6141private: 6142 param_type __p_; 6143 6144public: 6145 // constructor and reset functions 6146 _LIBCPP_INLINE_VISIBILITY 6147 piecewise_constant_distribution() {} 6148 template<class _InputIteratorB, class _InputIteratorW> 6149 _LIBCPP_INLINE_VISIBILITY 6150 piecewise_constant_distribution(_InputIteratorB __fB, 6151 _InputIteratorB __lB, 6152 _InputIteratorW __fW) 6153 : __p_(__fB, __lB, __fW) {} 6154 6155#ifndef _LIBCPP_CXX03_LANG 6156 template<class _UnaryOperation> 6157 _LIBCPP_INLINE_VISIBILITY 6158 piecewise_constant_distribution(initializer_list<result_type> __bl, 6159 _UnaryOperation __fw) 6160 : __p_(__bl, __fw) {} 6161#endif // _LIBCPP_CXX03_LANG 6162 6163 template<class _UnaryOperation> 6164 _LIBCPP_INLINE_VISIBILITY 6165 piecewise_constant_distribution(size_t __nw, result_type __xmin, 6166 result_type __xmax, _UnaryOperation __fw) 6167 : __p_(__nw, __xmin, __xmax, __fw) {} 6168 6169 _LIBCPP_INLINE_VISIBILITY 6170 explicit piecewise_constant_distribution(const param_type& __p) 6171 : __p_(__p) {} 6172 6173 _LIBCPP_INLINE_VISIBILITY 6174 void reset() {} 6175 6176 // generating functions 6177 template<class _URNG> 6178 _LIBCPP_INLINE_VISIBILITY 6179 result_type operator()(_URNG& __g) 6180 {return (*this)(__g, __p_);} 6181 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 6182 6183 // property functions 6184 _LIBCPP_INLINE_VISIBILITY 6185 vector<result_type> intervals() const {return __p_.intervals();} 6186 _LIBCPP_INLINE_VISIBILITY 6187 vector<result_type> densities() const {return __p_.densities();} 6188 6189 _LIBCPP_INLINE_VISIBILITY 6190 param_type param() const {return __p_;} 6191 _LIBCPP_INLINE_VISIBILITY 6192 void param(const param_type& __p) {__p_ = __p;} 6193 6194 _LIBCPP_INLINE_VISIBILITY 6195 result_type min() const {return __p_.__b_.front();} 6196 _LIBCPP_INLINE_VISIBILITY 6197 result_type max() const {return __p_.__b_.back();} 6198 6199 friend _LIBCPP_INLINE_VISIBILITY 6200 bool operator==(const piecewise_constant_distribution& __x, 6201 const piecewise_constant_distribution& __y) 6202 {return __x.__p_ == __y.__p_;} 6203 friend _LIBCPP_INLINE_VISIBILITY 6204 bool operator!=(const piecewise_constant_distribution& __x, 6205 const piecewise_constant_distribution& __y) 6206 {return !(__x == __y);} 6207 6208 template <class _CharT, class _Traits, class _RT> 6209 friend 6210 basic_ostream<_CharT, _Traits>& 6211 operator<<(basic_ostream<_CharT, _Traits>& __os, 6212 const piecewise_constant_distribution<_RT>& __x); 6213 6214 template <class _CharT, class _Traits, class _RT> 6215 friend 6216 basic_istream<_CharT, _Traits>& 6217 operator>>(basic_istream<_CharT, _Traits>& __is, 6218 piecewise_constant_distribution<_RT>& __x); 6219}; 6220 6221template<class _RealType> 6222typename piecewise_constant_distribution<_RealType>::param_type & 6223piecewise_constant_distribution<_RealType>::param_type::operator= 6224 (const param_type& __rhs) 6225{ 6226// These can throw 6227 __b_.reserve (__rhs.__b_.size ()); 6228 __densities_.reserve(__rhs.__densities_.size()); 6229 __areas_.reserve (__rhs.__areas_.size()); 6230 6231// These can not throw 6232 __b_ = __rhs.__b_; 6233 __densities_ = __rhs.__densities_; 6234 __areas_ = __rhs.__areas_; 6235 return *this; 6236} 6237 6238template<class _RealType> 6239void 6240piecewise_constant_distribution<_RealType>::param_type::__init() 6241{ 6242 // __densities_ contains non-normalized areas 6243 result_type __total_area = _VSTD::accumulate(__densities_.begin(), 6244 __densities_.end(), 6245 result_type()); 6246 for (size_t __i = 0; __i < __densities_.size(); ++__i) 6247 __densities_[__i] /= __total_area; 6248 // __densities_ contains normalized areas 6249 __areas_.assign(__densities_.size(), result_type()); 6250 _VSTD::partial_sum(__densities_.begin(), __densities_.end() - 1, 6251 __areas_.begin() + 1); 6252 // __areas_ contains partial sums of normalized areas: [0, __densities_ - 1] 6253 __densities_.back() = 1 - __areas_.back(); // correct round off error 6254 for (size_t __i = 0; __i < __densities_.size(); ++__i) 6255 __densities_[__i] /= (__b_[__i+1] - __b_[__i]); 6256 // __densities_ now contains __densities_ 6257} 6258 6259template<class _RealType> 6260piecewise_constant_distribution<_RealType>::param_type::param_type() 6261 : __b_(2), 6262 __densities_(1, 1.0), 6263 __areas_(1, 0.0) 6264{ 6265 __b_[1] = 1; 6266} 6267 6268template<class _RealType> 6269template<class _InputIteratorB, class _InputIteratorW> 6270piecewise_constant_distribution<_RealType>::param_type::param_type( 6271 _InputIteratorB __fB, _InputIteratorB __lB, _InputIteratorW __fW) 6272 : __b_(__fB, __lB) 6273{ 6274 if (__b_.size() < 2) 6275 { 6276 __b_.resize(2); 6277 __b_[0] = 0; 6278 __b_[1] = 1; 6279 __densities_.assign(1, 1.0); 6280 __areas_.assign(1, 0.0); 6281 } 6282 else 6283 { 6284 __densities_.reserve(__b_.size() - 1); 6285 for (size_t __i = 0; __i < __b_.size() - 1; ++__i, ++__fW) 6286 __densities_.push_back(*__fW); 6287 __init(); 6288 } 6289} 6290 6291#ifndef _LIBCPP_CXX03_LANG 6292 6293template<class _RealType> 6294template<class _UnaryOperation> 6295piecewise_constant_distribution<_RealType>::param_type::param_type( 6296 initializer_list<result_type> __bl, _UnaryOperation __fw) 6297 : __b_(__bl.begin(), __bl.end()) 6298{ 6299 if (__b_.size() < 2) 6300 { 6301 __b_.resize(2); 6302 __b_[0] = 0; 6303 __b_[1] = 1; 6304 __densities_.assign(1, 1.0); 6305 __areas_.assign(1, 0.0); 6306 } 6307 else 6308 { 6309 __densities_.reserve(__b_.size() - 1); 6310 for (size_t __i = 0; __i < __b_.size() - 1; ++__i) 6311 __densities_.push_back(__fw((__b_[__i+1] + __b_[__i])*.5)); 6312 __init(); 6313 } 6314} 6315 6316#endif // _LIBCPP_CXX03_LANG 6317 6318template<class _RealType> 6319template<class _UnaryOperation> 6320piecewise_constant_distribution<_RealType>::param_type::param_type( 6321 size_t __nw, result_type __xmin, result_type __xmax, _UnaryOperation __fw) 6322 : __b_(__nw == 0 ? 2 : __nw + 1) 6323{ 6324 size_t __n = __b_.size() - 1; 6325 result_type __d = (__xmax - __xmin) / __n; 6326 __densities_.reserve(__n); 6327 for (size_t __i = 0; __i < __n; ++__i) 6328 { 6329 __b_[__i] = __xmin + __i * __d; 6330 __densities_.push_back(__fw(__b_[__i] + __d*.5)); 6331 } 6332 __b_[__n] = __xmax; 6333 __init(); 6334} 6335 6336template<class _RealType> 6337template<class _URNG> 6338_RealType 6339piecewise_constant_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p) 6340{ 6341 typedef uniform_real_distribution<result_type> _Gen; 6342 result_type __u = _Gen()(__g); 6343 ptrdiff_t __k = _VSTD::upper_bound(__p.__areas_.begin(), __p.__areas_.end(), 6344 __u) - __p.__areas_.begin() - 1; 6345 return (__u - __p.__areas_[__k]) / __p.__densities_[__k] + __p.__b_[__k]; 6346} 6347 6348template <class _CharT, class _Traits, class _RT> 6349basic_ostream<_CharT, _Traits>& 6350operator<<(basic_ostream<_CharT, _Traits>& __os, 6351 const piecewise_constant_distribution<_RT>& __x) 6352{ 6353 __save_flags<_CharT, _Traits> __lx(__os); 6354 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 6355 ios_base::scientific); 6356 _CharT __sp = __os.widen(' '); 6357 __os.fill(__sp); 6358 size_t __n = __x.__p_.__b_.size(); 6359 __os << __n; 6360 for (size_t __i = 0; __i < __n; ++__i) 6361 __os << __sp << __x.__p_.__b_[__i]; 6362 __n = __x.__p_.__densities_.size(); 6363 __os << __sp << __n; 6364 for (size_t __i = 0; __i < __n; ++__i) 6365 __os << __sp << __x.__p_.__densities_[__i]; 6366 __n = __x.__p_.__areas_.size(); 6367 __os << __sp << __n; 6368 for (size_t __i = 0; __i < __n; ++__i) 6369 __os << __sp << __x.__p_.__areas_[__i]; 6370 return __os; 6371} 6372 6373template <class _CharT, class _Traits, class _RT> 6374basic_istream<_CharT, _Traits>& 6375operator>>(basic_istream<_CharT, _Traits>& __is, 6376 piecewise_constant_distribution<_RT>& __x) 6377{ 6378 typedef piecewise_constant_distribution<_RT> _Eng; 6379 typedef typename _Eng::result_type result_type; 6380 __save_flags<_CharT, _Traits> __lx(__is); 6381 __is.flags(ios_base::dec | ios_base::skipws); 6382 size_t __n; 6383 __is >> __n; 6384 vector<result_type> __b(__n); 6385 for (size_t __i = 0; __i < __n; ++__i) 6386 __is >> __b[__i]; 6387 __is >> __n; 6388 vector<result_type> __densities(__n); 6389 for (size_t __i = 0; __i < __n; ++__i) 6390 __is >> __densities[__i]; 6391 __is >> __n; 6392 vector<result_type> __areas(__n); 6393 for (size_t __i = 0; __i < __n; ++__i) 6394 __is >> __areas[__i]; 6395 if (!__is.fail()) 6396 { 6397 swap(__x.__p_.__b_, __b); 6398 swap(__x.__p_.__densities_, __densities); 6399 swap(__x.__p_.__areas_, __areas); 6400 } 6401 return __is; 6402} 6403 6404// piecewise_linear_distribution 6405 6406template<class _RealType = double> 6407class _LIBCPP_TEMPLATE_VIS piecewise_linear_distribution 6408{ 6409public: 6410 // types 6411 typedef _RealType result_type; 6412 6413 class _LIBCPP_TEMPLATE_VIS param_type 6414 { 6415 vector<result_type> __b_; 6416 vector<result_type> __densities_; 6417 vector<result_type> __areas_; 6418 public: 6419 typedef piecewise_linear_distribution distribution_type; 6420 6421 param_type(); 6422 template<class _InputIteratorB, class _InputIteratorW> 6423 param_type(_InputIteratorB __fB, _InputIteratorB __lB, 6424 _InputIteratorW __fW); 6425#ifndef _LIBCPP_CXX03_LANG 6426 template<class _UnaryOperation> 6427 param_type(initializer_list<result_type> __bl, _UnaryOperation __fw); 6428#endif // _LIBCPP_CXX03_LANG 6429 template<class _UnaryOperation> 6430 param_type(size_t __nw, result_type __xmin, result_type __xmax, 6431 _UnaryOperation __fw); 6432 param_type & operator=(const param_type& __rhs); 6433 6434 _LIBCPP_INLINE_VISIBILITY 6435 vector<result_type> intervals() const {return __b_;} 6436 _LIBCPP_INLINE_VISIBILITY 6437 vector<result_type> densities() const {return __densities_;} 6438 6439 friend _LIBCPP_INLINE_VISIBILITY 6440 bool operator==(const param_type& __x, const param_type& __y) 6441 {return __x.__densities_ == __y.__densities_ && __x.__b_ == __y.__b_;} 6442 friend _LIBCPP_INLINE_VISIBILITY 6443 bool operator!=(const param_type& __x, const param_type& __y) 6444 {return !(__x == __y);} 6445 6446 private: 6447 void __init(); 6448 6449 friend class piecewise_linear_distribution; 6450 6451 template <class _CharT, class _Traits, class _RT> 6452 friend 6453 basic_ostream<_CharT, _Traits>& 6454 operator<<(basic_ostream<_CharT, _Traits>& __os, 6455 const piecewise_linear_distribution<_RT>& __x); 6456 6457 template <class _CharT, class _Traits, class _RT> 6458 friend 6459 basic_istream<_CharT, _Traits>& 6460 operator>>(basic_istream<_CharT, _Traits>& __is, 6461 piecewise_linear_distribution<_RT>& __x); 6462 }; 6463 6464private: 6465 param_type __p_; 6466 6467public: 6468 // constructor and reset functions 6469 _LIBCPP_INLINE_VISIBILITY 6470 piecewise_linear_distribution() {} 6471 template<class _InputIteratorB, class _InputIteratorW> 6472 _LIBCPP_INLINE_VISIBILITY 6473 piecewise_linear_distribution(_InputIteratorB __fB, 6474 _InputIteratorB __lB, 6475 _InputIteratorW __fW) 6476 : __p_(__fB, __lB, __fW) {} 6477 6478#ifndef _LIBCPP_CXX03_LANG 6479 template<class _UnaryOperation> 6480 _LIBCPP_INLINE_VISIBILITY 6481 piecewise_linear_distribution(initializer_list<result_type> __bl, 6482 _UnaryOperation __fw) 6483 : __p_(__bl, __fw) {} 6484#endif // _LIBCPP_CXX03_LANG 6485 6486 template<class _UnaryOperation> 6487 _LIBCPP_INLINE_VISIBILITY 6488 piecewise_linear_distribution(size_t __nw, result_type __xmin, 6489 result_type __xmax, _UnaryOperation __fw) 6490 : __p_(__nw, __xmin, __xmax, __fw) {} 6491 6492 _LIBCPP_INLINE_VISIBILITY 6493 explicit piecewise_linear_distribution(const param_type& __p) 6494 : __p_(__p) {} 6495 6496 _LIBCPP_INLINE_VISIBILITY 6497 void reset() {} 6498 6499 // generating functions 6500 template<class _URNG> 6501 _LIBCPP_INLINE_VISIBILITY 6502 result_type operator()(_URNG& __g) 6503 {return (*this)(__g, __p_);} 6504 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 6505 6506 // property functions 6507 _LIBCPP_INLINE_VISIBILITY 6508 vector<result_type> intervals() const {return __p_.intervals();} 6509 _LIBCPP_INLINE_VISIBILITY 6510 vector<result_type> densities() const {return __p_.densities();} 6511 6512 _LIBCPP_INLINE_VISIBILITY 6513 param_type param() const {return __p_;} 6514 _LIBCPP_INLINE_VISIBILITY 6515 void param(const param_type& __p) {__p_ = __p;} 6516 6517 _LIBCPP_INLINE_VISIBILITY 6518 result_type min() const {return __p_.__b_.front();} 6519 _LIBCPP_INLINE_VISIBILITY 6520 result_type max() const {return __p_.__b_.back();} 6521 6522 friend _LIBCPP_INLINE_VISIBILITY 6523 bool operator==(const piecewise_linear_distribution& __x, 6524 const piecewise_linear_distribution& __y) 6525 {return __x.__p_ == __y.__p_;} 6526 friend _LIBCPP_INLINE_VISIBILITY 6527 bool operator!=(const piecewise_linear_distribution& __x, 6528 const piecewise_linear_distribution& __y) 6529 {return !(__x == __y);} 6530 6531 template <class _CharT, class _Traits, class _RT> 6532 friend 6533 basic_ostream<_CharT, _Traits>& 6534 operator<<(basic_ostream<_CharT, _Traits>& __os, 6535 const piecewise_linear_distribution<_RT>& __x); 6536 6537 template <class _CharT, class _Traits, class _RT> 6538 friend 6539 basic_istream<_CharT, _Traits>& 6540 operator>>(basic_istream<_CharT, _Traits>& __is, 6541 piecewise_linear_distribution<_RT>& __x); 6542}; 6543 6544template<class _RealType> 6545typename piecewise_linear_distribution<_RealType>::param_type & 6546piecewise_linear_distribution<_RealType>::param_type::operator= 6547 (const param_type& __rhs) 6548{ 6549// These can throw 6550 __b_.reserve (__rhs.__b_.size ()); 6551 __densities_.reserve(__rhs.__densities_.size()); 6552 __areas_.reserve (__rhs.__areas_.size()); 6553 6554// These can not throw 6555 __b_ = __rhs.__b_; 6556 __densities_ = __rhs.__densities_; 6557 __areas_ = __rhs.__areas_; 6558 return *this; 6559} 6560 6561 6562template<class _RealType> 6563void 6564piecewise_linear_distribution<_RealType>::param_type::__init() 6565{ 6566 __areas_.assign(__densities_.size() - 1, result_type()); 6567 result_type _Sp = 0; 6568 for (size_t __i = 0; __i < __areas_.size(); ++__i) 6569 { 6570 __areas_[__i] = (__densities_[__i+1] + __densities_[__i]) * 6571 (__b_[__i+1] - __b_[__i]) * .5; 6572 _Sp += __areas_[__i]; 6573 } 6574 for (size_t __i = __areas_.size(); __i > 1;) 6575 { 6576 --__i; 6577 __areas_[__i] = __areas_[__i-1] / _Sp; 6578 } 6579 __areas_[0] = 0; 6580 for (size_t __i = 1; __i < __areas_.size(); ++__i) 6581 __areas_[__i] += __areas_[__i-1]; 6582 for (size_t __i = 0; __i < __densities_.size(); ++__i) 6583 __densities_[__i] /= _Sp; 6584} 6585 6586template<class _RealType> 6587piecewise_linear_distribution<_RealType>::param_type::param_type() 6588 : __b_(2), 6589 __densities_(2, 1.0), 6590 __areas_(1, 0.0) 6591{ 6592 __b_[1] = 1; 6593} 6594 6595template<class _RealType> 6596template<class _InputIteratorB, class _InputIteratorW> 6597piecewise_linear_distribution<_RealType>::param_type::param_type( 6598 _InputIteratorB __fB, _InputIteratorB __lB, _InputIteratorW __fW) 6599 : __b_(__fB, __lB) 6600{ 6601 if (__b_.size() < 2) 6602 { 6603 __b_.resize(2); 6604 __b_[0] = 0; 6605 __b_[1] = 1; 6606 __densities_.assign(2, 1.0); 6607 __areas_.assign(1, 0.0); 6608 } 6609 else 6610 { 6611 __densities_.reserve(__b_.size()); 6612 for (size_t __i = 0; __i < __b_.size(); ++__i, ++__fW) 6613 __densities_.push_back(*__fW); 6614 __init(); 6615 } 6616} 6617 6618#ifndef _LIBCPP_CXX03_LANG 6619 6620template<class _RealType> 6621template<class _UnaryOperation> 6622piecewise_linear_distribution<_RealType>::param_type::param_type( 6623 initializer_list<result_type> __bl, _UnaryOperation __fw) 6624 : __b_(__bl.begin(), __bl.end()) 6625{ 6626 if (__b_.size() < 2) 6627 { 6628 __b_.resize(2); 6629 __b_[0] = 0; 6630 __b_[1] = 1; 6631 __densities_.assign(2, 1.0); 6632 __areas_.assign(1, 0.0); 6633 } 6634 else 6635 { 6636 __densities_.reserve(__b_.size()); 6637 for (size_t __i = 0; __i < __b_.size(); ++__i) 6638 __densities_.push_back(__fw(__b_[__i])); 6639 __init(); 6640 } 6641} 6642 6643#endif // _LIBCPP_CXX03_LANG 6644 6645template<class _RealType> 6646template<class _UnaryOperation> 6647piecewise_linear_distribution<_RealType>::param_type::param_type( 6648 size_t __nw, result_type __xmin, result_type __xmax, _UnaryOperation __fw) 6649 : __b_(__nw == 0 ? 2 : __nw + 1) 6650{ 6651 size_t __n = __b_.size() - 1; 6652 result_type __d = (__xmax - __xmin) / __n; 6653 __densities_.reserve(__b_.size()); 6654 for (size_t __i = 0; __i < __n; ++__i) 6655 { 6656 __b_[__i] = __xmin + __i * __d; 6657 __densities_.push_back(__fw(__b_[__i])); 6658 } 6659 __b_[__n] = __xmax; 6660 __densities_.push_back(__fw(__b_[__n])); 6661 __init(); 6662} 6663 6664template<class _RealType> 6665template<class _URNG> 6666_RealType 6667piecewise_linear_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p) 6668{ 6669 typedef uniform_real_distribution<result_type> _Gen; 6670 result_type __u = _Gen()(__g); 6671 ptrdiff_t __k = _VSTD::upper_bound(__p.__areas_.begin(), __p.__areas_.end(), 6672 __u) - __p.__areas_.begin() - 1; 6673 __u -= __p.__areas_[__k]; 6674 const result_type __dk = __p.__densities_[__k]; 6675 const result_type __dk1 = __p.__densities_[__k+1]; 6676 const result_type __deltad = __dk1 - __dk; 6677 const result_type __bk = __p.__b_[__k]; 6678 if (__deltad == 0) 6679 return __u / __dk + __bk; 6680 const result_type __bk1 = __p.__b_[__k+1]; 6681 const result_type __deltab = __bk1 - __bk; 6682 return (__bk * __dk1 - __bk1 * __dk + 6683 _VSTD::sqrt(__deltab * (__deltab * __dk * __dk + 2 * __deltad * __u))) / 6684 __deltad; 6685} 6686 6687template <class _CharT, class _Traits, class _RT> 6688basic_ostream<_CharT, _Traits>& 6689operator<<(basic_ostream<_CharT, _Traits>& __os, 6690 const piecewise_linear_distribution<_RT>& __x) 6691{ 6692 __save_flags<_CharT, _Traits> __lx(__os); 6693 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 6694 ios_base::scientific); 6695 _CharT __sp = __os.widen(' '); 6696 __os.fill(__sp); 6697 size_t __n = __x.__p_.__b_.size(); 6698 __os << __n; 6699 for (size_t __i = 0; __i < __n; ++__i) 6700 __os << __sp << __x.__p_.__b_[__i]; 6701 __n = __x.__p_.__densities_.size(); 6702 __os << __sp << __n; 6703 for (size_t __i = 0; __i < __n; ++__i) 6704 __os << __sp << __x.__p_.__densities_[__i]; 6705 __n = __x.__p_.__areas_.size(); 6706 __os << __sp << __n; 6707 for (size_t __i = 0; __i < __n; ++__i) 6708 __os << __sp << __x.__p_.__areas_[__i]; 6709 return __os; 6710} 6711 6712template <class _CharT, class _Traits, class _RT> 6713basic_istream<_CharT, _Traits>& 6714operator>>(basic_istream<_CharT, _Traits>& __is, 6715 piecewise_linear_distribution<_RT>& __x) 6716{ 6717 typedef piecewise_linear_distribution<_RT> _Eng; 6718 typedef typename _Eng::result_type result_type; 6719 __save_flags<_CharT, _Traits> __lx(__is); 6720 __is.flags(ios_base::dec | ios_base::skipws); 6721 size_t __n; 6722 __is >> __n; 6723 vector<result_type> __b(__n); 6724 for (size_t __i = 0; __i < __n; ++__i) 6725 __is >> __b[__i]; 6726 __is >> __n; 6727 vector<result_type> __densities(__n); 6728 for (size_t __i = 0; __i < __n; ++__i) 6729 __is >> __densities[__i]; 6730 __is >> __n; 6731 vector<result_type> __areas(__n); 6732 for (size_t __i = 0; __i < __n; ++__i) 6733 __is >> __areas[__i]; 6734 if (!__is.fail()) 6735 { 6736 swap(__x.__p_.__b_, __b); 6737 swap(__x.__p_.__densities_, __densities); 6738 swap(__x.__p_.__areas_, __areas); 6739 } 6740 return __is; 6741} 6742 6743_LIBCPP_END_NAMESPACE_STD 6744 6745_LIBCPP_POP_MACROS 6746 6747#endif // _LIBCPP_RANDOM 6748